Do you ever look around you and think you're the only one making any sense? Swedish behavioural scientist Thomas Erikson is here to help. In this book he presents his simple model based on four personality types (Red, Blue, Green and Yellow). When you understand the psychology of each you can adapt your communication style to handle anyone more easily and get the best out of the people you have to deal with - be it at work, in public or at home. Number 1 Swedish runaway bestseller.