Book PDF


Archive.org has some great chess classics.

Here are some:
https://www.chessuniversity.com/articles/resources-and-tools/free-chess-books/
https://archive.org/search.php?query=Chess%20AND%20collection%3Aamericana (as noted by @notmtwain)
And I believe all of these are free as well:
https://www.gutenberg.org/ebooks/subject/1677
Enjoy!

not free, but very cheap and legitimate....there is also a 30-day free trial...
Scribd For Online Chess Book Reading, Downloading...
https://www.chess.com/blog/RussBell/scribd-com-for-online-chess-book-reading