We resort to lies all the time, for various reasons and in different situations. How many troubles and problems could have been avoided if we knew the true situation and were not misled. This book is one of the attempts to do everything possible so that there are fewer lies and deception in our lives, which means that someone becomes happier. Here is a practical guide to toolless lie detection. It contains not only advice, but also tasks for practicing skills on your own. When the dear reader completes at least part of the proposed tasks and exercises, the lie will become quite obvious to him. Despite the fact that the text is presented in a very accessible way, it is based on thousands of studies, real field experiments and a sample that any social psychologist or psychotherapist would envy, and most importantly, it is absolutely scientific. The publication is suitable for everyone who wants to gain freedom, look lies straight in the eye and see it, tell the truth with ease and be happy - discover a different view not only on the psychology of lies, but also on other models and motives of human behavior. The book will also be of interest to psychologists and psychotherapists, polygraph examiners, lawyers and law enforcement officers, personnel selection specialists, business owners, negotiators, project managers - raise the level of your knowledge, learn new models of lie recognition.