Contains links to over 11,000 titles. The books are offered in several versions, including HTML, image format, and .pdf. Users may browse titles by subject or conduct a keyword search. Users can check the New Online page for the latest published and prepublication books added to the site or sign up for a free email notification service. Since 1971, Project Gutenberg has sought to put paper editions in the public domain into electronic format.
Volunteers submit books that they have converted into electronic format.