Ever caught a spouse, business partner, parent, boss, or child brazenly lying? What if you could tell someone was lying, just by listening and observing? Let decorated military interrogator Gregory Hartley show you how to do it.How to Spot a Liar was the first book to give you the tools to figure out what's really going on--to gain the upper hand in salary negotiation, move a prospective client toward the outcome you desire, or find out why you need to end a business or personal relationship.This newly revised edition delves deeper into how and why people lie. In it, the authors respond directly to reader requests for more details on reading and using body language to your advantage.Who needs How to Spot a Liar? Anyone with a cheating spouse or manipulative boss. Anyone conducting job interviews or cold-calling prospective customers. Anyone who has teenagers at home or works on Capitol Hill. Anyone whose success and happiness depends on clear communication with others. And anyone who wants to become just a bit more inscrutable, in business, in life...even at the poker table!