Question: How can I discover books that have similar themes or elements to my favorite novels?

If you want to find books that match some of the themes or elements of your favorite novels, The StoryGraph is worth a look. The service analyzes your reading history and preferences to provide personalized book recommendations. It has features like mood-based discovery, custom tags, reading challenges and detailed ratings so you can find books that match your preferences.

If you want an attribute-based search, BookAbout offers an AI-powered service that lets you search for books by many attributes, not just author or genre. With a database updated daily, it can help you find new books that match your tastes even when you can't quite remember the details.

Last, NextThreeBooks offers personalized book recommendations with GPT-3 technology. You can tell it your preferred genre and writing style, and it'll suggest three books tailored to your tastes. The system is designed to help readers quickly find new books they'll like, and the recommendations are tailored to your interests.