This is one of the most thorough books I've ever read! I selected to read this book strictly because I thought it would appeal to middle school readers and would add diversity to a classroom library. I was certainly not expecting to become fascinated as I read about the science behind espionage. This book would definitely appeal to middle school readers with a variety of interests -specifically though with interests in science and history. Additionally, I think this book could be an excellent resource for students past the middle school grades as the text addresses multiple aspects of espionage. The text is broken into three chapters 1) Why spy?, 2)Spies and Secret Services, and 3) Techniques and Equipment. Subtopics are covered in two page spreads and focus on elements such as Early Spies, Breaking In and Getting Out, and Disguise. Very intriguing! ( )