OpenAI now tries to hide that ChatGPT was trained on copyrighted books, including J.K. Rowling’s Harry Potter series::A new research paper laid out ways in which AI developers should try and avoid showing LLMs have been trained on copyrighted material.
Again that is dependent on how similar the two books are. If I just change the names of the characters and change the grammatical structure and then try to sell the book as my own work, I am infringing the copyright. If my book has a different story but the themes are influenced by another book, then I don’t believe that is copyright infringement. Now where the line between infringement and no infringement lies is not something I can say and is a topic for another discussion
I.e. change form. Copyright protect form, thus in coutries that judge either by spirit or letter of law instead of size of moneybags this is ok.