Hongkiat.com offers the 20 best websites to download free ebooks. Here is the list. List is heavy on computer/tech sites. Gutenberg appears to have made the runner up list- which includes an additional 15 sites, so let’s make it the 35 best websites for free Ebooks.
Portal on all aspects of ebooks and digital content and for all creating, reading, publishing, managing, curating, and distributing the written word and other content in digital format, including publishers, writers, editors, content developers, distributors, educators, librarians and information science professionals. With contributions from book and library professionals and thought leaders in the United States and around the world.