first In my opinion, dotnettips.info is the best Iranian programming site Especially for dot net users
this script convert and merge https://www.dotnettips.info/ articles Epub to html and azw3 file to simple read content on kindle and etc...
- just download epub file and change format to rar and extract it from https://www.dotnettips.info/newsarchive/news/13557
- set articles and save as place by your pc path
- to convert html file to azw3 format you should install calibre app from by https://calibre-ebook.com/download_windows