[calibrejunkie]

Originally Posted by salty-horse

"CC0" is a Creative Commons synonym for Public Domain.

The main source is Project Gutenberg.

There are several projects that turn these into nicer ebooks:
Standard Ebooks makes handcrafted books, and they also fix typos and such.
And there's also Feedbooks.

BTW, thanks for these links! I did not know about Standard Ebooks or Feedbooks.