Another good option is BooksAI, a mobile app that uses ChatGPT to generate more than 40 million AI-written summaries of books. It offers three types of summaries -- spoiler-free, spoiler-filled and hybrid -- and suggests books based on your ratings. It's good for readers who want to explore books originally written in other languages and get some personalized recommendations.
If you want a more free-form search, BookAbout lets you search by many attributes besides author or genre. It uses AI to match your query to a database of more than 500,000 books, and it's updated daily with new releases. That makes it a good option for book lovers looking for something new that's likely to appeal to them.