[1]
Free eBooks are also available online through Project Gutenberg [1], a nonprofit organization which has over 42,000 titles in various languages. They offer many of the Classics. These books are free because their copyright has expired, so this isn't the place to find the new releases!
Links
[1] http://www.gutenberg.org/
[2] https://www.addtoany.com/share#url=https%3A%2F%2Freedlibrary.org%2Fcontent%2Fproject-gutenberg&title=Project%20Gutenberg