Not my kind of book. Basically, this book is for writers, academic writers, and students. 

By slip box, I'm fairly sure he meant to write pensieve, because I never did figure out what it actually is. I didn't like the translation, and at times didn't care for the whole tone. I wanted to DNF almost immediately but gave it seven days. I spent money on this. Maybe someday I'll figure it out but that day is not today and not tomorrow either. 

I have not used a Zettelkasten (yet) so I cannot judge this book on the merits of the system it presents, but I found that it spend too much time detailing the philosophy behind the system rather than actually explain how everything ought to be put together. I am inclined towards setting a slip-box myself but I will refer to online resources for guidance rather than this book. Nonetheless, said online resources would likely not exist if not for this book popularizing the system and I concede the book makes a great case for taking smart notes. Therefore, I am giving it 3,5 stars, rounded down to 3.
challenging informative medium-paced
informative slow-paced
informative inspiring reflective
informative inspiring medium-paced
informative slow-paced
informative reflective medium-paced

Boring. Long winded. Confusing