Marwan MERY is a much respected professional negotiator and has carried out hundreds of negotiations and interviews throughout the world. Along with these activities, he worked for many years for casinos in Europe and the US helping them protect themselves from professional cheats. Marwan MERY is the author of numerous books, one of which is You’re Lying!, endorsed by Paul Ekman. He likewise teaches lie detection and complex negotiations at Sorbonne University. Marwan Mery regularly intervenes in companies of varying sizes and governmental organisations.