As a collection of 2 pages essays on good software practices, the book offers a pretty heterogeneous reading experience. Despite that, the book is an pleasant and quick read, which covers all aspects of software development, from coding to testing and from technical to human-related concerns.
If you're familiar with the practices that the Agile, XP or Software Craftsmanship movements are putting forward, you'll find that you already knew and agreed with most of the book. In that case, the real value of this book will come from the few essays you'll find questioning or disagreeing with, as you will have to self-introspect and decide if your disagreement is founded or based on prejudices.
In conclusion, I think this book will often be found in the "must read" list of books that teams provide to their junior programmers.