diff --git a/src/model/Book.java b/src/model/Book.java
index 1191b14..ddd15a1 100644
--- a/src/model/Book.java
+++ b/src/model/Book.java
@@ -7,18 +7,26 @@ public class Book {
   private int publicationYear;
   private boolean isBorrowed;
 
+
+//Constructor
+  public Book(String title,String author,String isbn,int publicationYear,boolean isBorrowed){
+      this.title=title;
+      this.author=author;
+      this.isbn=isbn;this.publicationYear=publicationYear;
+      this.isBorrowed=isBorrowed;
+  }
+//Setter
   public void borrowBook() {
-    // TODO: Implement method 'borrowBook'.
-    throw new UnsupportedOperationException("Unimplemented method 'borrowBook'");
+      this.isBorrowed=true;
   }
 
   public void returnBook() {
-    // TODO: Implement method 'returnBook'.
-    throw new UnsupportedOperationException("Unimplemented method 'returnBook'");
-  }
-
-  public void getDetails() {
-    // TODO: Implement method 'getDetails'.
-    throw new UnsupportedOperationException("Unimplemented method 'getDetails'");
+      this.isBorrowed=false;
   }
+//Getter
+  public String  getTitle()           {return this.title;}
+  public String  getAuthor()          {return this.author;}
+  public String  getIsbn()            {return this.isbn;}
+  public Integer getPublicationYear() {return this.publicationYear;}
+  public boolean getIsBorrowed()      {return this.isBorrowed;}
 }
diff --git a/src/model/Category.java b/src/model/Category.java
index 81700eb..e1e52ac 100644
--- a/src/model/Category.java
+++ b/src/model/Category.java
@@ -3,14 +3,16 @@
 public class Category {
   private String name;
   private String description;
-
-  public void getName() {
-    // TODO: Implement method 'getName'.
-    throw new UnsupportedOperationException("Unimplemented method 'getName'");
+//Constructor
+  public Category(String name,String description){
+      this.name=name;
+      this.description=description;
   }
-
-  public void getDescription() {
-    // TODO: Implement method 'getDescription'.
-    throw new UnsupportedOperationException("Unimplemented method 'getDescription'");
+//Getter
+  public String getName() {
+      return this.name;
+  }
+  public String getDescription() {
+      return this.description;
   }
 }