Personally, I've had good luck with HathiTrust Digital Library [0] for old books in the public domain. A majority of the books that I've cared to check are mirr

Personally, I've had good luck with HathiTrust Digital Library [0] for old books in the public domain. A majority of the books that I've cared to check are mirrored on both IA and HathiTrust. It has an arbitrary restriction that you can't download full PDFs, but at least the contents are all available. [0] https://www.hathitrust.org/ https://www.hathitrust.org/