The kind of writing that makes it feel like the book he wanted to write couldn't have been written much better, even with a large amount of further effort. Very concise, clear, sequential, useful writing that is easy to understand and apply without being boring or taking too long to read. Feels like a structured essay that was brutally pared down to the most important parts.
Chapters are short explanations/summaries of various concepts and strategies (usually focused on one per chapter along with a story or real life example) that are simplified and then fitted to a lightweight, easy to remember framework, allowing for easy recall and individual contextual extrapolation in your real life. As always, different books are better or worse fits for different people at different points in their lives that have different tastes and usage cases. This book has its own style, and if you think it might be a good fit for what you need, you should consider it. I found it fun to read, interesting and useful.