A group of 11 authors of popular science literature has joined a lawsuit against OpenAI and Microsoft, accusing them of copyright infringement, writes Reuters.

This is a class action lawsuit in Manhattan Federal Court filed last month by Hollywood Reporter author and editor Julian Sunkton.

The companies are accused of illegally using books to train ChatGPT models and other AI-based software.

The lawsuit was joined by writers including Pulitzer Prize winners Taylor Branch, Stacy Schiff, and Kai Bird. By the way, Kai Byrd is a co-author of J. Robert Oppenheimer’s biography American Prometheus, which was adapted into the movie Oppenheimer this year.

“The defendants are raking in billions from their unauthorized use of nonfiction books, and the authors of these books deserve fair compensation and treatment for it,” noted the writers’ attorney.

The amended lawsuit alleges that OpenAI collected the authors’ works, along with other copyrighted material from the Internet, without permission to train its GPT models to respond to human text prompts.

The document also states that Microsoft was “extensively involved” in the training and development of the models and is also responsible for copyright infringement.

The authors asked for an unspecified amount of damages and an order to stop infringing their copyrights.