Question: I'm looking for a service that suggests new books to read based on my favorite authors and genres.

If you want a service that recommends books based on your favorite authors and genres, The StoryGraph is a great choice. It tracks your reading history and offers personalized recommendations based on your preferences, mood, and themes. The service also offers features like mood-based discovery, custom tags and reading challenges, and you can import your Goodreads data.

Another service worth checking out is NextThreeBooks. This AI-based recommendation engine uses GPT-3 technology to match books to your preferences for genre, writing style and content. It offers three curated book recommendations that should be of interest to you, so you can easily find new reading material.

If you're into AI-generated summaries, BooksAI offers summaries of more than 40 million books, including spoiler-free and spoiler-inclusive options. It also offers AI-recommended books based on your preferences, so it's a good tool to help you find what you're looking for.

If you want a more general-purpose book-discovery tool, BookAbout lets you search for books by a variety of attributes besides just author or genre. It matches your query against a database of more than 500,000 books so you can find what you're looking for even when you can't quite put your finger on the details.