Extended Readings on Copyright is a free Copyright Law textbook released under a Creative Commons license. The author released an initial version in 2019. Version 2 of the 2021 edition was last revised on May 14, 2021.
The version includes several technical corrections and some major updates in response to Andy Warhol Foundation for the Visual Arts, Inc. v. Goldsmith, (2d Cir. Mar. 26, 2021) and Google LLC. v. Oracle America, Inc., (April 5, 2021).
Extended Readings on Copyright is designed to be easy to use, so you can download it in Microsoft Word format or as a PDF.