Is it illegal to sell AI-generated books?

Is it considered illegal to sell books that have been created solely by artificial intelligence, or AI? This question arises as the technology for AI-generated content continues to advance, with AI capable of producing everything from short stories to full-length novels. While some argue that these books should be protected under copyright laws, others maintain that since AI lacks human creativity and originality, they cannot be considered true works of authorship. What is the legal status of AI-generated books, and are there any restrictions on their sale?