If you're looking for something other than BookSlice, there are a few other options that might be of interest.
Trellis is an AI-based information retrieval system that comes with a built-in AI companion, Celeste, that can give you immediate answers and insights about what you're reading. It also has customizable audio versions of files, a single document repository, and the ability to share conversations and reading history with friends. The service can be used for personalized learning with adaptive tools that can be set up for different needs, so it's a good option for those who want a full-fledged reading companion.
Another option is The StoryGraph, which tracks and analyzes your reading activity to provide book recommendations based on your preferences, mood and themes. It has features like tracking and insights through charts and graphs, AI-based recommendations, mood-based discovery and reading challenges. The service is available on mobile and web, so you can use it in whatever way is most convenient for you, and it's a good option for book lovers.
If you want to cut down on the work of finding new books, BooksAI offers a mobile app with more than 40 million AI-generated summaries of books. It's available in nine languages, can recommend books based on your favorite books, and has features like celebrity book lists and a favorites list to organize books. The app is good for readers who want to explore books from other countries or get recommendations.