The [US Copyright Office]’s notice granting [the human author] copyright registration of her book does not recognize her as author of the whole text as is conventional for written works. Instead she is considered the author of the “selection, coordination, and arrangement of text generated by artificial intelligence.” This means no one can copy the book without permission, but the actual sentences and paragraphs themselves are not copyrighted and could theoretically be rearranged and republished as a different book.
(The activist author is also famous for other reasons.)