Boiling a Book Down
Get the skeleton first, then decide which chapters deserve a close read
I'm going to read [book title], in order to [what I want to solve]. Please: 1) explain the book's main thesis in 5 sentences, including how the claims depend on each other; 2) give a chapter map, one sentence each on what that chapter contributes to the chain; 3) mark the 2–3 core chapters and the parts that can be skipped, with reasons; 4) point out where the author merely asserts without proving; 5) give me 3 questions I should be able to answer when I'm done.
How to use
Look at the chapter map before deciding what to read closely; reading cover to cover mostly just uses up the time.
Good for
- You are about to spend twenty hours on a 400-page book for one concrete problem and want to know which chapters actually matter
- You have finished the book and want to check whether you kept the spine or only a handful of quotable lines
Not for
- The book is very new, very niche, or internal material the model has likely never read, so its chapter map will be fabricated
- It is a novel, poems, or essays, where the value is the language and the experience, and compressing it into theses destroys it
Example
Input
Thinking, Fast and Slow, with the goal of judging whether my own user-research conclusions are reliable.
What you get
Five sentences that chain into a dependency: two systems, heuristics and biases, how bias contaminates judgement, peak-end and remembered experience. The chapter map should mark Parts 1 and 3 as directly relevant to the reliability of research conclusions and the utility chapters as optional. It should also note that some priming studies cited in the book later failed replication, which is where the author simply asserts. The three closing questions should be usable to audit my own research report.
Common mistakes
- Using the chapter map instead of reading and then citing the book in a meeting: you are citing a second-hand skeleton and one detail question exposes it
- Applying it to a book published last month and trusting invented chapters, then using that to decide what to skip
Try tweaking it like this
- State my purpose in the prompt and ask it to reorder chapters by that purpose, so the map becomes a route instead of a table of contents
- Add 'mark which conclusions have since been overturned or weakened': useful for social-science books from five or more years ago