I definitely wish that every technical book was as well researched and written as this one is. If you're trying to build a network management application using TCL/Tk, this book is invaluable. Watch out for two things, however: The Scotty examples are using a pre-release 3.0 version of TNM, while most of us in the real world are using the non-commercial 2.1.9 version, so the examples don't work exactly as shown. Also, the website that the book directs you to doesn't have all of the code discussed in the book. Despite these few flaws, it's still worth five stars in my opinion.