The subtitle describes the book well, in that the book is aimed to students, academics, and book writers. While a great source of knowledge around Luhmann's zettlekasten and the theory around it, it does spend a lot of time focusing on the academic side of the system.

Dr. Ahrens breaks down the key parts of Luhmann's system, how to implement it yourself, and points out new starter pitfalls by directing you to understand that it is a system of note-taking, not a component part that you can easily integrate.

Worthy of a read if you're interested in PKM, knowledge management, and note taking.