In our relationships, whether romantic, familial, or workplace, it isn't always easy to understand each other. Using the four-color or DISC method, created by Walter Clarke in 1956, this books gives us insight into the various personality types around us, with its four-color classification of personality profiles: red (dominance), yellow (influence), green (steadiness), and blue (conscientiousness). Many tips and exercises will help readers improve their communication with others.