TheBookSum is an AI-powered tool that offers rapid, in-depth textual summaries of books. By inputting the title and author of a book, users can generate not just overall summaries, but also too long; didn't read (TLDR) versions, key takeaways, and chapter overviews. These summaries are designed to deliver the main elements of the book's content in an accessible and efficient manner. Powered by advances in AI technology, TheBookSum aims to provide high-quality and accurate summaries irrespective of the complexity or length of the original text. This tool can be used to summarize a wide range of book genres including academic texts, self-help guides, fiction, non-fiction, and technical guides. It segments the summaries to facilitate easy understanding, and it extracts and explains the main concepts and keywords from the books. This efficient and easily accessible tool is designed to enhance reader's understanding and knowledge acquisition. In addition to this, the platform offers features that allow users to save and share the summaries for future reference and collaborative discussion. Regardless of changes in book editions or alterations in text, this AI mechanism consistently delivers reliable, quick and insightful book summaries.