Updated Date on Public Domain Use

Works that were created prior to 1924 is of public use and is automatically placed within the public domain.

If you are interested in obtaining material that is free of any copyright and aren't interested in doing a lot of research in validating whether material can or cannot be used, focus your search on material that was created prior to 1924 as it is part of the public domain and will be freely available to you.

An example of a new book that has just entered the public domain is The Land That Time Forgot by Edgar Rice Burroughs