GoogleHelper.com
book search  https://cloudconvert.com/epub-to-pdf 

This has libgen plus zlib plus scihub, I believe it’s the largest pirate library:

https://annas-archive.org/

https://search.yibook.org/ 

https://www.google.com/advanced_search?hl=en 

format converter https://cloudconvert.com/epub-to-pdf 

www.scribd.com