Sometimes reading body language is important. However, sometimes it can be surprisingly difficult. Statement analysis is the perfect medium, working much more often while remaining fairly simple. This book is a brief, yet helpful, summary of statement analysis. It contains real-world scenarios and how to respond to them.
Version 2.0 comes with significant changes, major new examples, and tons of re-done content. I think you'll love it.
Very basic information you can find on most websites. Writing isn't awful, but very informal. I read it in less than 15 minutes. This book is not worth buying.