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Some materials are in the public domain, which means the intellectual property is not owned or controlled by any person or entity. Materials in the public domain can be used freely, although they may need to be properly cited.
What is public domain?
The public domain covers works not protected by copyright. Learn which works are in the public domain and how works become a part of it. Created by the U.S. Copyright Office.
This chart, developed by Peter B. Hirtle and maintained at the Cornell Copyright Information Center at Cornell University, lists copyright terms of various types of published and unpublished works, with dates those works fall into the public domain.
A large digital library with more than 11 million volumes with more than a third of these available for full text access and download (primarily books and journals published before 1923 and U.S. Government publications).
A library of over 60,000 free eBooks. Choose among free epub and Kindle eBooks, download them or read them online. You will find the world's great literature here, with focus on older works for which U.S. copyright has expired.