For a book to be legally digitized and available online, either the holder of the copyright has to give permission for the digitization, or the book needs to be in the public domain. In the U.S., books in the public domain are usually those that were published prior to 1923, although under certain limited conditions later works may also be in the public domain. For the most part books that are freely available online will be those that are in the public domain.
Rutgers, The State University of New Jersey, an equal access/equal opportunity institution. Individuals with disabilities are encouraged to direct suggestions, comments, or complaints concerning any accessibility issues with Rutgers web sites to: email@example.com or complete the Report Accessibility Barrier / Provide Feedback Form.