This book only gives a description of what we notice in other people anyway. It does not give explanation to why we act in certain ways, what are the reasons or meaning behind. The lesson about lies is quite enjoyable but to be honest, I don't know any more about how to read body language than I did before reading the book. I believe the author is an expert, but he did not manage to share any of his knowledge in this piece, I am afraid. Definitely not worth buying.