A trade group for U.S. authors has sued OpenAI in Manhattan federal court on behalf of prominent writers including John Grisham, Jonathan Franzen, George Saunders, Jodi Picoult and "Game of Thrones" novelist George R.R. Martin, accusing the company of unlawfully training its popular artificial-intelligence based chatbot ChatGPT on their work.
It could also indicate that other summaries of the texts were used to train the LLM and that it is summarizing those summaries. The actual book doesn’t need to be there, unless you can have it spit out the actual text of the book itself?