https://annas-archive.li/ and others are still online. They also have multiple other mirrors. Calibre desktop app and annas archive is killer combo for ebook readers like kindle and kobo.

4 mirrors thus far 💪 Best place for all our epub and pdf book needs 🫡 to the legends who make and maintain it. https://primal.net/e/nevent1qqs0ggx8mxxxxmysnzl2yavv3pnzg7002um4kyu0h875fvntwd8x07gmm7k5r