"How to get the favor of people and learn to influence them": the recommendations of the former FBI agent FBI agent Jack Schaefer had to use unusual strategies to effectively interact with the environment, in particular with spies and criminals. For twenty years, a behavioral analyst has been developing original methods of influencing people. He emphasizes that these strategies are also suitable for everyday life: to build strong relationships, learn to recognize lies and understand the behavior of others. The advice of a former FBI agent will help executives, experienced managers and novice sellers, parents and teachers, as well as anyone who seeks to build friendships or romance and master the super-complex art of liking people at first sight.