AI book summaries capture roughly 80-90% of the key concepts and main points from a book. While they can’t replicate the full reading experience or catch subtle nuances, they excel at extracting core ideas, major plot points, and essential arguments. The summaries are particularly effective for non-fiction books where concrete ideas and concepts are clearly stated. However, for literary works with complex themes or emotional depth, the AI summary serves best as a complement to, rather than replacement for, the full reading experience.