If you want an AI-powered book recommendation service, one good option is The StoryGraph. It'll analyze your reading history and offer recommendations based on your preferences, mood and themes. It also offers features like mood-based discovery, live reactions, reading buddies, custom tags and a mobile app. The service is free, but some features are premium.
Another good option is BookAbout, which uses AI to match you with books based on a broader set of attributes than just author or genre. It's got a database of more than 500,000 books that's updated daily, and it's designed to help you find what you like even when you can't articulate what that is.
If you want something more personal, check out NextThreeBooks. The service offers readers three book recommendations based on their preferences, like genre, writing style and content. It uses GPT-3 technology to make sure the recommendations are personalized so you can find new books you'll enjoy.