I was fortunate to receive a copy from Jerry a few years back and have found this book to be most useful in my day to day job as a software tester. As a tester, I am constantly observing, learning and attempting to understand the systems that I'm working on and this book helps me and reminds me how I can become better at doing that.
Jerry's book is clear,understandable and very easy to read. It is written by a master tester and a master author and has given me some ideas on how to observe systems that I work on and systems that I am a part of.
Thanks very much Jerry :)