Lena wrote You're Lying! because no matter what your profession or life circumstances, you need the skills to take control of a situation, detect deception, and reveal the truth. While you probably won't ever have to interrogate a detainee who doesn't want to tell you about an upcoming terrorist attack as Lena has You're Lying! will help you deal with that salesperson trying to rip you off, the kid bullying your child who claims innocence, a cheating spouse, or dissembling boss. As the adage says, knowledge is power.