Book reader for non-specialists. Reconstructs a whole book on two independent axes: a source-blind reader can retell what the book literally follows, how its indispensable lines relate, and where it ends; the same reader can enter a concrete path in which evidence, events, or consequences revise understanding. Never let a portable thesis replace the book itself. USE WHEN given a book title, PDF, EPUB, excerpt, or asked 拆书, 分析这本书, 这本书在讲什么, 压缩一本书, or book. Defaults to a saved Org note. NOT FOR chapter summaries, papers, formal reviews, or single-concept deep dives.