• Open Textbook Library
  •  
  • Cool 4 Ed
  •  
  • Khan Academy
  •  
  • Ebooks Directory
    Searchable by keyword or topic.
  •  
  • HathiTrust
    A collection of millions of titles digitized from libraries around the world, including many of the great philosophy texts.
  •  
  • Project Gutenberg
    Project Gutenberg offers thousands of free ebooks. Books can be searched by title or by category.
  •  
  • Open Library searches a variety of sources for print and online books. Many ebooks are freely available for online reading or download.