Question: I'm looking for a way to quickly scan and digest the most important information from books, can you suggest a solution?

Coral AI is a top contender. It can extract information from PDFs in more than 90 languages. With features like summarization, question answering with page citations, and study guide generation, Coral AI lets you quickly analyze books and other documents, potentially freeing up 10-15 hours a week.

Another good option is BooksAI.com. This service uses ChatGPT to create summaries, key points, quotes and to-do lists from books. You can search for books, get immediate summaries and bookmark passages for easier reference. It's geared for book lovers and researchers who want to quickly understand the main points without reading the whole book.

If you're looking for something more general purpose, Chapterize.ai uses AI to extract information from long documents and boil it down into key messages. It offers short summaries, a personal library and export options. You can use it in the cloud, so you can get summaries anywhere, anytime. It also comes with a chatbot interface to ask questions about the content and the ability to export summaries as Markdown.

Last, Notedly is an AI-powered service to help students quickly understand complex information in textbooks, articles, lectures and videos. It uses auto summarization, complex content simplification and AI search to create notes in seconds. Notedly is designed to reduce reading stress and save time, so it's a good option for anyone who needs to quickly understand a lot of information.