Thanks to the title, I had high expectations when I cracked this book open. By the end, I was shaking my head. Certainly the scripts in the book were well written and functional, but 'wicked cool'?
The purpose of the book is to be a cookbook, so if you need to do something you can use the techniques in here to put a script together. Most of the scripts were doing things that I couldn't see me doing in a production environment. I think this book can be a good learning tool for beginners, but with the plethora of free online resources the web seems an attractive alternative.
I give the book a 5 out of 10 - interesting, but not earth-shattering. A more realistic title, such as 'Linux Bash cookbook' would have put my expectations in line with the content.