Mobilism.me for books and audiobooks (my #1 favorite) ebooks channel on IRCHighway for ebooks (2nd favorite) Ebookee.com Ebooks3000.com Libgen.gs for technical manuals, textbooks, and magazines
Sites from the comments: b-ok.cc (shared by u/VincentX66) b-ok.xyz (shared by u/peachylass) ebookbb.com/ (shared by u/MissGingerMinge z-lib.org (shared by u/Zeroamer) myanonamouse (shared by u/squishy0071 yudhacookbook.my.id (shared by u/bookiegal2003)
from https://www.reddit.com/r/Piracy/comments/kyuet4/best_sites_for_ebooks_and_audiobooks_heres_my/