From 7ba04feafa319f55889543de73837f514a870385 Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 11:26:25 +0100
Subject: [PATCH 01/15] setup and configured

---
 .gitignore   |  4 ++++
 .prettierrc  |  7 +++++++
 package.json | 24 ++++++++++++++++++++++++
 3 files changed, 35 insertions(+)
 create mode 100644 .prettierrc
 create mode 100644 package.json

diff --git a/.gitignore b/.gitignore
index 2b76d7c..cb04f0c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -156,3 +156,7 @@ dist
 vite.config.js.timestamp-*
 vite.config.ts.timestamp-*
 
+node_modules/
+package-lock.json
+.env
+.DS_store
diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..b2b47dc
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,7 @@
+{
+  "semi": true,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "es5",
+  "printWidth": 80
+}
\ No newline at end of file
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..32db0e6
--- /dev/null
+++ b/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "c55-core-week-6",
+  "version": "1.0.0",
+  "description": "The week 6 assignment for the HackYourFuture Core program can be found at the following link: https://hub.hackyourfuture.nl/core-program-week-6-assignment",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/hannahwn/c55-core-week-6.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "bugs": {
+    "url": "https://github.com/hannahwn/c55-core-week-6/issues"
+  },
+  "homepage": "https://github.com/hannahwn/c55-core-week-6#readme",
+  "dependencies": {
+    "chalk": "^4.1.2"
+  }
+}

From 64a56f3c9a1aa14850a107f78575773aa3132b8d Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 12:10:03 +0100
Subject: [PATCH 02/15] made a list of books

---
 reading-list-manager/books.json | 63 ++++++++++++++++++++++++++++++++-
 1 file changed, 62 insertions(+), 1 deletion(-)

diff --git a/reading-list-manager/books.json b/reading-list-manager/books.json
index 0637a08..3c550b2 100644
--- a/reading-list-manager/books.json
+++ b/reading-list-manager/books.json
@@ -1 +1,62 @@
-[]
\ No newline at end of file
+const books = [
+
+  {
+    id: 1,
+    title: "1984",
+    author: "George Orwell",
+    genre: "Fiction",
+    read: false
+  },
+
+  {
+    id: 2,
+    title: "The Havoc of Choice",
+    author: "Wanjiru Koinange",
+    genre: "African Literature",
+    read: true
+  },
+
+  {
+    id: 3,
+    title: "CreepShow",
+    author: "Stephen King",
+    genre: "Comic",
+    read: false
+  },
+
+  {
+    id: 4,
+    title: "Fire and Ice",
+    author: "Erin Hunter",
+    genre: "Fiction",
+    read: true
+  },
+
+  {
+    id: 5,
+    title: "Toxic Bachelors",
+    author: "Daniella Steel",
+    genre: "Adult",
+    read: false
+  },
+
+  {
+    id: 6,
+    title: "Foxes in a fix",
+    author: "Bruce Cameron",
+    genre: "Animals",
+    read: true
+  },
+
+  {
+    id: 7,
+    title: "The Luzhin Defense",
+    author: "Vladimir Nabokov",
+    genre: "Chess",
+    read: false
+  }
+
+  // ... at least 5 books
+];
+
+module.exports = { books };
\ No newline at end of file

From da0a961bf3caed2e00e3928b090b1c56699bec6c Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 12:21:50 +0100
Subject: [PATCH 03/15] corrected error in my array

---
 reading-list-manager/books.json | 77 ++++++++++++++++-----------------
 1 file changed, 38 insertions(+), 39 deletions(-)

diff --git a/reading-list-manager/books.json b/reading-list-manager/books.json
index 3c550b2..d0850c3 100644
--- a/reading-list-manager/books.json
+++ b/reading-list-manager/books.json
@@ -1,62 +1,61 @@
-const books = [
+[
 
   {
-    id: 1,
-    title: "1984",
-    author: "George Orwell",
-    genre: "Fiction",
-    read: false
+   "id": 1,
+    "title": "1984",
+    "author": "George Orwell",
+    "genre": "Fiction",
+    "read": false
   },
 
   {
-    id: 2,
-    title: "The Havoc of Choice",
-    author: "Wanjiru Koinange",
-    genre: "African Literature",
-    read: true
+    "id": 2,
+    "title": "The Havoc of Choice",
+    "author": "Wanjiru Koinange",
+    "genre": "African Literature",
+    "read": true
   },
 
   {
-    id: 3,
-    title: "CreepShow",
-    author: "Stephen King",
-    genre: "Comic",
-    read: false
+    "id": 3,
+    "title": "CreepShow",
+    "author": "Stephen King",
+    "genre": "Comic",
+    "read": false
   },
 
   {
-    id: 4,
-    title: "Fire and Ice",
-    author: "Erin Hunter",
-    genre: "Fiction",
-    read: true
+    "id": 4,
+    "title": "Fire and Ice",
+    "author": "Erin Hunter",
+    "genre": "Fiction",
+    "read": true
   },
 
   {
-    id: 5,
-    title: "Toxic Bachelors",
-    author: "Daniella Steel",
-    genre: "Adult",
-    read: false
+    "id": 5,
+    "title": "Toxic Bachelors",
+    "author": "Daniella Steel",
+    "genre": "Adult",
+    "read": false
   },
 
   {
-    id: 6,
-    title: "Foxes in a fix",
-    author: "Bruce Cameron",
-    genre: "Animals",
-    read: true
+    "id": 6,
+    "title": "Foxes in a fix",
+    "author": "Bruce Cameron",
+    "genre": "Animals",
+    "read": true
   },
 
   {
-    id: 7,
-    title: "The Luzhin Defense",
-    author: "Vladimir Nabokov",
-    genre: "Chess",
-    read: false
+    "id": 7,
+    "title": "The Luzhin Defense",
+    "author": "Vladimir Nabokov",
+    "genre": "Chess",
+    "read": false
   }
 
-  // ... at least 5 books
-];
+  
+]
 
-module.exports = { books };
\ No newline at end of file

From a685ad7a7f3ea9e7a2edaeec7c2a4dd96e71d39e Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 12:47:13 +0100
Subject: [PATCH 04/15] added loadBooks()

---
 reading-list-manager/readingList.js | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index 84febab..f83ce1a 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -1,11 +1,29 @@
 // Place here the file operation functions for loading and saving books
+const fs = require('fs');
+const chalk = require('chalk');
+
+const FILE_NAME = 'books.json';
 
 function loadBooks() {
   // TODO: Implement this function
-  // Read from books.json
+   // Read from books.json
+  try{
+    const data = fs.readdirSync(FILE_NAME,'utf8');
+    return JSON.parse(data);
+  }
   // Handle missing file (create empty array)
-  // Handle invalid JSON (notify user, use empty array)
-  // Use try-catch for error handling
+  catch (error){
+    if (error.code === 'ENOENT'){
+      console.log(chalk.yellow('No books file found.Starting again'));
+      return[];
+    }
+      // Handle invalid JSON (notify user, use empty array)
+      if (error instanceof SyntaxError){
+        console.log(chalk.red('Error loading books:'), error.message);
+        return[];
+      }
+  }
+  //Use try-catch for error handling
 }
 
 function saveBooks(books) {

From 561ac1cf3e050292d033f5ea1e53330ffbcec31c Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 18:46:52 +0100
Subject: [PATCH 05/15] added saveBooks

---
 reading-list-manager/readingList.js | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index f83ce1a..9b2521f 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -19,17 +19,28 @@ function loadBooks() {
     }
       // Handle invalid JSON (notify user, use empty array)
       if (error instanceof SyntaxError){
-        console.log(chalk.red('Error loading books:'), error.message);
+        console.log(chalk.red('Book file is broken. Starting fresh!'));
         return[];
       }
+      //Use try-catch for error handling
+      console.log(chalk.red('Error loading books:'),error.message);
+      return[];
   }
-  //Use try-catch for error handling
+  
 }
 
 function saveBooks(books) {
   // TODO: Implement this function
   // Write books array to books.json
   // Use try-catch for error handling
+  try{
+    const data =JSON.stringify(books,null,2);
+    fs.writeFileSync(FILE_NAME,data);
+    console.log(chalk.green('Saved :'));
+  }
+  catch (error){
+    console.log(chalk.red('Save failed'),error.message);
+  }
 }
 
 function addBook(book) {

From fcc16ea0f5d85963bf92d2d9ed5d5c4f20eda688 Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 19:20:32 +0100
Subject: [PATCH 06/15] added addBook

---
 reading-list-manager/readingList.js | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index 9b2521f..d0b0a28 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -43,8 +43,29 @@ function saveBooks(books) {
   }
 }
 
-function addBook(book) {
+function addBook(books, titles, author, genre) {
   // TODO: Implement this function
+  //Create new book
+  const newBook = {
+    id: books.length + 1,
+    title: title,
+    author: author,
+    genre: genre,
+    read: false
+  };
+
+  
+  books.push(newBook);
+  
+  
+  saveBooks(books);
+  
+  
+  console.log(chalk.green(`✓ Added "${title}"`));
+  
+  return books;
+
+
 }
 
 function getUnreadBooks() {

From 5c966d603df6c81aa0e2d27936a65cb3ed7bb5e9 Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 19:24:34 +0100
Subject: [PATCH 07/15] added getBooksByGenre

---
 reading-list-manager/readingList.js | 37 +++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index d0b0a28..00e16d0 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -68,12 +68,45 @@ function addBook(books, titles, author, genre) {
 
 }
 
-function getUnreadBooks() {
+function getUnreadBooks(books) {
   // TODO: Implement this function using filter()
+   const unreadBooks = books.filter(function(book) {
+    return book.read === false;
+  });
+
+  console.log(chalk.blue('\n--- UNREAD BOOKS ---'));
+  if (unreadBooks.length === 0) {
+    console.log(chalk.yellow('No unread books!'));
+  } else {
+    for (let i = 0; i < unreadBooks.length; i++) {
+      const book = unreadBooks[i];
+      console.log(`${book.id}. ${book.title} by ${book.author}`);
+    }
+  }
+  
+  return unreadBooks;
+
+
 }
 
-function getBooksByGenre(genre) {
+function getBooksByGenre(books, genre) {
   // TODO: Implement this function using filter()
+   const genreBooks = books.filter(function(book) {
+    return book.genre.toLowerCase() === genre.toLowerCase();
+  });
+
+  console.log(chalk.blue(`\n--- ${genre} BOOKS ---`));
+  if (genreBooks.length === 0) {
+    console.log(chalk.yellow(`No ${genre} books!`));
+  } else {
+    for (let i = 0; i < genreBooks.length; i++) {
+      const book = genreBooks[i];
+      const readStatus = book.read ? '✓' : '○';
+      console.log(`${readStatus} ${book.id}. ${book.title} by ${book.author}`);
+    }
+  }
+  
+  return genreBooks;
 }
 
 function markAsRead(id) {

From 66392ed6926468cc4f789a285d09fc0efd647c02 Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 19:36:34 +0100
Subject: [PATCH 08/15] Added to get total books

---
 reading-list-manager/readingList.js | 39 ++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index 00e16d0..8ccdc3a 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -109,12 +109,49 @@ function getBooksByGenre(books, genre) {
   return genreBooks;
 }
 
-function markAsRead(id) {
+function markAsRead(books, id) {
   // TODO: Implement this function using map()
+  const updatedBooks = books.map(function(book) {
+
+    if (book.id === id) {
+       return {
+        id: book.id,
+        title: book.title,
+        author: book.author,
+        genre: book.genre,
+        read: true
+      };
+    }
+    
+    return book;
+  });
+
+  //Does book exist?
+
+  const oldBook = books.find(function(book) {
+    return book.id === id;
+  });
+  
+  if (!oldBook) {
+    console.log(chalk.red(`✗ Book #${id} not found!`));
+    return books;
+  }
+  
+  // Save changes
+  saveBooks(updatedBooks);
+  console.log(chalk.green(`✓ Marked "${oldBook.title}" as read!`));
+  
+  return updatedBooks;
 }
 
+
+  
+
 function getTotalBooks() {
   // TODO: Implement this function using length
+   const total = books.length;
+  console.log(chalk.blue(`\nTotal books: ${total}`));
+  return total;
 }
 
 function hasUnreadBooks() {

From 1788255c031c5842917403bbe9dade7e1be17679 Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 19:46:34 +0100
Subject: [PATCH 09/15] added to print all books

---
 reading-list-manager/readingList.js | 36 ++++++++++++++++++++++++++---
 1 file changed, 33 insertions(+), 3 deletions(-)

diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index 8ccdc3a..b79074f 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -147,22 +147,51 @@ function markAsRead(books, id) {
 
   
 
-function getTotalBooks() {
+function getTotalBooks(books) {
   // TODO: Implement this function using length
    const total = books.length;
   console.log(chalk.blue(`\nTotal books: ${total}`));
   return total;
 }
 
-function hasUnreadBooks() {
+function hasUnreadBooks(books) {
   // TODO: Implement this function using some()
+  const hasUnread = books.some(function(book) {
+    return book.read === false;
+  });
+  
+  if (hasUnread) {
+    console.log(chalk.yellow('You have books to read!'));
+  } else {
+    console.log(chalk.green('All books are read!'));
+  }
+  
+  return hasUnread;
+
 }
 
-function printAllBooks() {
+function printAllBooks(books) {
   // TODO: Implement this function
   // Loop through and display with chalk
   // Use green for read books, yellow for unread
   // Use cyan for titles
+  console.log(chalk.blue('\n--- ALL BOOKS ---'));
+  
+  if (books.length === 0) {
+    console.log(chalk.yellow('No books yet!'));
+    return;
+  }
+  
+  for (let i = 0; i < books.length; i++) {
+    const book = books[i];
+    let status;
+    if (book.read) {
+      status = chalk.green('✓ Read');
+    } else {
+      status = chalk.red('○ Unread');
+    }
+    console.log(`${book.id}. ${book.title} by ${book.author} - ${status}`);
+  }
 }
 
 function printSummary() {
@@ -170,4 +199,5 @@ function printSummary() {
   // Show statistics with chalk
   // Display total books, read count, unread count
   // Use bold for stats
+  
 }
\ No newline at end of file

From 82c6adf025aad0441d588fbb927f29b0228b7392 Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 20:12:09 +0100
Subject: [PATCH 10/15] prints summary at the end

---
 reading-list-manager/readingList.js | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index b79074f..3ae3020 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -194,10 +194,31 @@ function printAllBooks(books) {
   }
 }
 
-function printSummary() {
+function printSummary(books) {
   // TODO: Implement this function
   // Show statistics with chalk
   // Display total books, read count, unread count
   // Use bold for stats
+  console.log(chalk.blue('\n--- READING SUMMARY ---'));
+  
+  // Total books
+  const total = books.length;
+  console.log(`Total: ${total}`);
+  
+  // Count read books
+  let readCount = 0;
+  for (let i = 0; i < books.length; i++) {
+    if (books[i].read) {
+      readCount++;
+    }
+  }
+  const unreadCount = total - readCount;
+  
+  console.log(chalk.green(`Read: ${readCount}`));
+  console.log(chalk.red(`Unread: ${unreadCount}`));
+
+}
+
+module.exports = {
   
 }
\ No newline at end of file

From b331165caf9175a4a86505eeefbcd6056654c6e9 Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 20:55:26 +0100
Subject: [PATCH 11/15] prints a summary of the list

---
 reading-list-manager/app.js         | 25 ++++++++++++++++++++-----
 reading-list-manager/readingList.js | 15 +++++++++++++--
 2 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/reading-list-manager/app.js b/reading-list-manager/app.js
index b0365ef..323cdc0 100644
--- a/reading-list-manager/app.js
+++ b/reading-list-manager/app.js
@@ -2,11 +2,26 @@
 // node app.js
 
 // TODO: Implement the main application logic here
-// 1. Load books on startup
-// 2. Display all books
-// 3. Show summary statistics
-// 4. Add example of filtering by genre or read/unread status
-// 5. Add example of marking a book as read
+const readingList = require('./readingList');
+const chalk = require('chalk');
+
+function main() {
+  console.log(chalk.blue('=== MY READING LIST ==='));
+
+  // 1. Load books on startup
+  let myBooks = readingList.loadBooks();
+  // 2. Display all books
+  readingList.showAllBooks(myBooks);
+  // 3. Show summary statistics
+  readingList.printSummary(myBooks);
+  // 4. Add example of filtering by genre or read/unread status
+  readingList.getBooksByGenre(myBooks);
+  // 5. Add example of marking a book as read
+  console.log(chalk.blue('/n === Marking a book as read ==='));
+  myBooks = readingList.markAsRead(myBooks);
+}
+
+main();
 
 console.log('📚 MY READING LIST 📚\n');
 
diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index 3ae3020..713e53e 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -220,5 +220,16 @@ function printSummary(books) {
 }
 
 module.exports = {
-  
-}
\ No newline at end of file
+  loadBooks,
+  saveBooks,
+  addBook,
+  getUnreadBooks,
+  getBooksByGenre,
+  markAsRead,
+  getTotalBooks,
+  hasUnreadBooks,
+  printAllBooks,
+  printSummary
+  
+
+};
\ No newline at end of file

From 373c6abd09960d818898205f9dac84cc921a411a Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 22:22:25 +0100
Subject: [PATCH 12/15] fixed the filtering by genre error

---
 reading-list-manager/app.js         |   4 +-
 reading-list-manager/books.json     |   8 +-
 reading-list-manager/readingList.js | 144 ++++++++++++++--------------
 3 files changed, 78 insertions(+), 78 deletions(-)

diff --git a/reading-list-manager/app.js b/reading-list-manager/app.js
index 323cdc0..e4339d9 100644
--- a/reading-list-manager/app.js
+++ b/reading-list-manager/app.js
@@ -11,11 +11,11 @@ function main() {
   // 1. Load books on startup
   let myBooks = readingList.loadBooks();
   // 2. Display all books
-  readingList.showAllBooks(myBooks);
+  readingList.printAllBooks(myBooks);
   // 3. Show summary statistics
   readingList.printSummary(myBooks);
   // 4. Add example of filtering by genre or read/unread status
-  readingList.getBooksByGenre(myBooks);
+  readingList.getBooksByGenre(myBooks, 'Fiction');
   // 5. Add example of marking a book as read
   console.log(chalk.blue('/n === Marking a book as read ==='));
   myBooks = readingList.markAsRead(myBooks);
diff --git a/reading-list-manager/books.json b/reading-list-manager/books.json
index d0850c3..e889da3 100644
--- a/reading-list-manager/books.json
+++ b/reading-list-manager/books.json
@@ -1,7 +1,6 @@
 [
-
   {
-   "id": 1,
+    "id": 1,
     "title": "1984",
     "author": "George Orwell",
     "genre": "Fiction",
@@ -55,7 +54,4 @@
     "genre": "Chess",
     "read": false
   }
-
-  
-]
-
+]
\ No newline at end of file
diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index 713e53e..bc346de 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -5,41 +5,46 @@ const chalk = require('chalk');
 const FILE_NAME = 'books.json';
 
 function loadBooks() {
-  // TODO: Implement this function
-   // Read from books.json
-  try{
-    const data = fs.readdirSync(FILE_NAME,'utf8');
-    return JSON.parse(data);
-  }
-  // Handle missing file (create empty array)
-  catch (error){
-    if (error.code === 'ENOENT'){
-      console.log(chalk.yellow('No books file found.Starting again'));
-      return[];
+  try {
+    const content = fs.readFileSync('./books.json', 'utf8');
+    const books = JSON.parse(content);
+
+    if (!Array.isArray(books)) {
+      console.log(chalk.yellow('Books data was not an array – starting fresh'));
+      return [];
+    }
+
+    return books;
+  } catch (error) {
+    if (error.code === 'ENOENT') {
+      console.log(
+        chalk.yellow('No books.json found. Starting with empty list.')
+      );
+      return [];
+    }
+    if (error instanceof SyntaxError) {
+      console.log(
+        chalk.red(
+          'Invalid JSON in books.json – file is broken. Starting fresh!'
+        )
+      );
+      return [];
     }
-      // Handle invalid JSON (notify user, use empty array)
-      if (error instanceof SyntaxError){
-        console.log(chalk.red('Book file is broken. Starting fresh!'));
-        return[];
-      }
-      //Use try-catch for error handling
-      console.log(chalk.red('Error loading books:'),error.message);
-      return[];
+    console.log(chalk.red('Error loading books:'), error.message);
+    return [];
   }
-  
 }
 
 function saveBooks(books) {
   // TODO: Implement this function
   // Write books array to books.json
   // Use try-catch for error handling
-  try{
-    const data =JSON.stringify(books,null,2);
-    fs.writeFileSync(FILE_NAME,data);
+  try {
+    const data = JSON.stringify(books, null, 2);
+    fs.writeFileSync(FILE_NAME, data);
     console.log(chalk.green('Saved :'));
-  }
-  catch (error){
-    console.log(chalk.red('Save failed'),error.message);
+  } catch (error) {
+    console.log(chalk.red('Save failed'), error.message);
   }
 }
 
@@ -51,26 +56,21 @@ function addBook(books, titles, author, genre) {
     title: title,
     author: author,
     genre: genre,
-    read: false
+    read: false,
   };
 
-  
   books.push(newBook);
-  
-  
+
   saveBooks(books);
-  
-  
-  console.log(chalk.green(`✓ Added "${title}"`));
-  
-  return books;
 
+  console.log(chalk.green(`✓ Added "${title}"`));
 
+  return books;
 }
 
 function getUnreadBooks(books) {
   // TODO: Implement this function using filter()
-   const unreadBooks = books.filter(function(book) {
+  const unreadBooks = books.filter(function (book) {
     return book.read === false;
   });
 
@@ -83,19 +83,31 @@ function getUnreadBooks(books) {
       console.log(`${book.id}. ${book.title} by ${book.author}`);
     }
   }
-  
-  return unreadBooks;
-
 
+  return unreadBooks;
 }
 
 function getBooksByGenre(books, genre) {
   // TODO: Implement this function using filter()
-   const genreBooks = books.filter(function(book) {
-    return book.genre.toLowerCase() === genre.toLowerCase();
-  });
+
+  console.log('DEBUG → books type:', typeof books);
+  console.log('DEBUG → is array?:', Array.isArray(books));
+  console.log(
+    'DEBUG → books length:',
+    books?.length ?? 'N/A (books not array)'
+  );
+
+  // Safe filter – prevents crash even if array has holes, undefined items, null, etc.
+  const genreBooks = books.filter(
+    (book) =>
+      book &&
+      typeof book === 'object' && // exists & is object (not null/undefined)
+      typeof book.genre === 'string' && // genre exists and is actually a string
+      book.genre.toLowerCase() === genre.toLowerCase()
+  );
 
   console.log(chalk.blue(`\n--- ${genre} BOOKS ---`));
+
   if (genreBooks.length === 0) {
     console.log(chalk.yellow(`No ${genre} books!`));
   } else {
@@ -105,69 +117,64 @@ function getBooksByGenre(books, genre) {
       console.log(`${readStatus} ${book.id}. ${book.title} by ${book.author}`);
     }
   }
-  
+
   return genreBooks;
 }
 
 function markAsRead(books, id) {
   // TODO: Implement this function using map()
-  const updatedBooks = books.map(function(book) {
-
+  const updatedBooks = books.map(function (book) {
     if (book.id === id) {
-       return {
+      return {
         id: book.id,
         title: book.title,
         author: book.author,
         genre: book.genre,
-        read: true
+        read: true,
       };
     }
-    
+
     return book;
   });
 
   //Does book exist?
 
-  const oldBook = books.find(function(book) {
+  const oldBook = books.find(function (book) {
     return book.id === id;
   });
-  
+
   if (!oldBook) {
     console.log(chalk.red(`✗ Book #${id} not found!`));
     return books;
   }
-  
+
   // Save changes
   saveBooks(updatedBooks);
   console.log(chalk.green(`✓ Marked "${oldBook.title}" as read!`));
-  
+
   return updatedBooks;
 }
 
-
-  
-
 function getTotalBooks(books) {
   // TODO: Implement this function using length
-   const total = books.length;
+  const total = books.length;
   console.log(chalk.blue(`\nTotal books: ${total}`));
   return total;
 }
 
 function hasUnreadBooks(books) {
   // TODO: Implement this function using some()
-  const hasUnread = books.some(function(book) {
+  const hasUnread = books.some(function (book) {
     return book.read === false;
   });
-  
+
   if (hasUnread) {
     console.log(chalk.yellow('You have books to read!'));
   } else {
     console.log(chalk.green('All books are read!'));
   }
-  
-  return hasUnread;
 
+  return hasUnread;
 }
 
 function printAllBooks(books) {
@@ -176,12 +183,12 @@ function printAllBooks(books) {
   // Use green for read books, yellow for unread
   // Use cyan for titles
   console.log(chalk.blue('\n--- ALL BOOKS ---'));
-  
+
   if (books.length === 0) {
     console.log(chalk.yellow('No books yet!'));
     return;
   }
-  
+
   for (let i = 0; i < books.length; i++) {
     const book = books[i];
     let status;
@@ -200,11 +207,11 @@ function printSummary(books) {
   // Display total books, read count, unread count
   // Use bold for stats
   console.log(chalk.blue('\n--- READING SUMMARY ---'));
-  
+
   // Total books
   const total = books.length;
   console.log(`Total: ${total}`);
-  
+
   // Count read books
   let readCount = 0;
   for (let i = 0; i < books.length; i++) {
@@ -213,10 +220,9 @@ function printSummary(books) {
     }
   }
   const unreadCount = total - readCount;
-  
+
   console.log(chalk.green(`Read: ${readCount}`));
   console.log(chalk.red(`Unread: ${unreadCount}`));
-
 }
 
 module.exports = {
@@ -229,7 +235,5 @@ module.exports = {
   getTotalBooks,
   hasUnreadBooks,
   printAllBooks,
-  printSummary
-  
-
-};
\ No newline at end of file
+  printSummary,
+};

From f354c3d78aafa5d79eda5a7ec29693276ba291ef Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 22:32:41 +0100
Subject: [PATCH 13/15] marked 7 as read

---
 reading-list-manager/app.js | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/reading-list-manager/app.js b/reading-list-manager/app.js
index e4339d9..e1d9bb6 100644
--- a/reading-list-manager/app.js
+++ b/reading-list-manager/app.js
@@ -5,6 +5,9 @@
 const readingList = require('./readingList');
 const chalk = require('chalk');
 
+console.log('📚 MY READING LIST 📚\n');
+
+// Your implementation here
 function main() {
   console.log(chalk.blue('=== MY READING LIST ==='));
 
@@ -22,7 +25,3 @@ function main() {
 }
 
 main();
-
-console.log('📚 MY READING LIST 📚\n');
-
-// Your implementation here

From 2a28d43025ca744eb34434519a284028068bb424 Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 22:33:13 +0100
Subject: [PATCH 14/15] marked 7 as read

---
 reading-list-manager/app.js     |   2 +-
 reading-list-manager/books.json | 106 +++++++++++++++-----------------
 2 files changed, 51 insertions(+), 57 deletions(-)

diff --git a/reading-list-manager/app.js b/reading-list-manager/app.js
index e1d9bb6..9532ba1 100644
--- a/reading-list-manager/app.js
+++ b/reading-list-manager/app.js
@@ -21,7 +21,7 @@ function main() {
   readingList.getBooksByGenre(myBooks, 'Fiction');
   // 5. Add example of marking a book as read
   console.log(chalk.blue('/n === Marking a book as read ==='));
-  myBooks = readingList.markAsRead(myBooks);
+  myBooks = readingList.markAsRead(myBooks, 7);
 }
 
 main();
diff --git a/reading-list-manager/books.json b/reading-list-manager/books.json
index e889da3..0d29e49 100644
--- a/reading-list-manager/books.json
+++ b/reading-list-manager/books.json
@@ -1,57 +1,51 @@
-[
-  {
-    "id": 1,
-    "title": "1984",
-    "author": "George Orwell",
-    "genre": "Fiction",
-    "read": false
-  },
-
-  {
-    "id": 2,
-    "title": "The Havoc of Choice",
-    "author": "Wanjiru Koinange",
-    "genre": "African Literature",
-    "read": true
-  },
-
-  {
-    "id": 3,
-    "title": "CreepShow",
-    "author": "Stephen King",
-    "genre": "Comic",
-    "read": false
-  },
-
-  {
-    "id": 4,
-    "title": "Fire and Ice",
-    "author": "Erin Hunter",
-    "genre": "Fiction",
-    "read": true
-  },
-
-  {
-    "id": 5,
-    "title": "Toxic Bachelors",
-    "author": "Daniella Steel",
-    "genre": "Adult",
-    "read": false
-  },
-
-  {
-    "id": 6,
-    "title": "Foxes in a fix",
-    "author": "Bruce Cameron",
-    "genre": "Animals",
-    "read": true
-  },
-
-  {
-    "id": 7,
-    "title": "The Luzhin Defense",
-    "author": "Vladimir Nabokov",
-    "genre": "Chess",
-    "read": false
-  }
+[
+  {
+    "id": 1,
+    "title": "1984",
+    "author": "George Orwell",
+    "genre": "Fiction",
+    "read": false
+  },
+  {
+    "id": 2,
+    "title": "The Havoc of Choice",
+    "author": "Wanjiru Koinange",
+    "genre": "African Literature",
+    "read": true
+  },
+  {
+    "id": 3,
+    "title": "CreepShow",
+    "author": "Stephen King",
+    "genre": "Comic",
+    "read": false
+  },
+  {
+    "id": 4,
+    "title": "Fire and Ice",
+    "author": "Erin Hunter",
+    "genre": "Fiction",
+    "read": true
+  },
+  {
+    "id": 5,
+    "title": "Toxic Bachelors",
+    "author": "Daniella Steel",
+    "genre": "Adult",
+    "read": false
+  },
+  {
+    "id": 6,
+    "title": "Foxes in a fix",
+    "author": "Bruce Cameron",
+    "genre": "Animals",
+    "read": true
+  },
+  {
+    "id": 7,
+    "title": "The Luzhin Defense",
+    "author": "Vladimir Nabokov",
+    "genre": "Chess",
+    "read": true
+  }
 ]
\ No newline at end of file

From eaf966363b1166f1f4d0ea83385f45c1c89953c5 Mon Sep 17 00:00:00 2001
From: hannahwn <hannahwanjikunyongo@gmail.com>
Date: Wed, 18 Feb 2026 22:37:12 +0100
Subject: [PATCH 15/15] added cyan colour

---
 reading-list-manager/readingList.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index bc346de..50707f5 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -197,7 +197,9 @@ function printAllBooks(books) {
     } else {
       status = chalk.red('○ Unread');
     }
-    console.log(`${book.id}. ${book.title} by ${book.author} - ${status}`);
+    console.log(
+      `${book.id}.${chalk.cyan(book.title)} by ${book.author} - ${status}`
+    );
   }
 }