Summary of the book of what every body says

Imagine that you are sitting with someone you like and admitted to his love. Does this mean that he really loves you? How do you know is it really true, or is he manipulating your feelings? What if there is a way to reveal the intentions of people as soon as we talk to them and avoid the disappointments of hopes? Body language is the key to understanding people's real ideas, and I guarantee a way to know the sincerity of their feelings