In this book Robert L. Leahy provides the reader with an understanding of why jealousy is a universal emotion that we find in all cultures, among children, and even among animals. Reviewing evolutionary theory, attachment theory and CBT models, the author provides readers of an understanding of how the mind gets hijacked and the individual gets overwhelmed with emotions. The reader is then introduced to a step-by-step description of how one can use emotion regulation techniques, cognitive restructuring, problem solving, acceptance and mindfulness to keep jealousy from undermining relationships. In the case in which jealousy has justification, the author offers descriptions of how to discuss jealousy without attacking each other, develop guidelines for building trust, and–if necessary– assess the validity of changing the relationship.