Amazon.com offers over 35 000 free books. Freebook Sifter makes it easy to find them.

The site organizes the books by category, with options to search, order by average ranking, or filter by language. The “Added Today” category might be the most important function. This category lists books that are free for a limited time. Subscribe to their RSS Feed to keep up with the newly added books.

freebooksifter.com