A fantastic book with a unique approach to note-taking. I think that the slip-box technique presented by the author is extremely useful for anyone in need of a system to help them write, think, and create. The power of the technique lies in it's ability to help you build up a network of interconnected notes and turn that into your idea generator. In a way, it allows you to have discussion with your past-self to find good ideas, correct mistakes, develop your arguments, and improve your own thoughts. This bottom-up approach, as the author argued, not only make it easier to trace back your train of thoughts and see where the idea clutters have built up, but also allow you to be more flexible compare to the top-down approach of starting out with an idea/topic and fill in your notes under sections and subsections. 

One small thing I dislike about the book is that the pacing could be a bit faster for an informative book. There are a few chapters and sections that just repeats something already mentioned before. But I suppose that it could also be a positive thing that helps us understand the concepts better, and you can always skim over those parts so it's not really a big problem.

Another thing that can be improve is the lack of example. Although the idea behind the slip-box is relatively simple and easy to implement, I am quite curious to see some actual cases of what an ideal slip-box looks like. 

All in all, a really solid book on note-taking. I find the slip-box technique to be very useful as a thinking and creative tool. The book aims towards writers and researcher, but I think that the technique will be useful to anyone. As the author said, we all think, reads, and write, so why not take some smart notes along the way to improve ourselves and make our lives easier?