Emanuel Maiberg writes: “Google Books is indexing low quality, AI-generated books that will turn up in search results and could possibly impact Google Ngram viewer, an important tool used by researchers to track language use throughout history. Searching Google Books for the term ‘As of my last knowledge update,’ which is associated with ChatGPT-generated answers, returns dozens of books that include that phrase. Most of the books in the first eight pages of results turned up by the search appear to be AI-generated and are not about AI.”