Motivation provides an accessible introduction to motivation and emotion, combining classic studies with current research and uses numerous real-world examples to engage the student and make, often difficult, theoretical concepts come to life. By understanding and applying the principles of motivation described in the text, students will not only discover insights into what motivates their own behavior but also how to instigate self-change through goal-setting.　

Throughout the book the author adopts an evolutionary approach to explore the effect of interpersonal relationships, food preferences, fear, music, and the emotions on motivation, at the same time considering how personality traits and psychological needs are essential for understanding why people are motivated by different things. The motivation of compulsive behavior from addictions, such as drugs, gambling, Internet gaming, and obsessive exercise is also considered, providing a truly comprehensive overview of biological, psychological, and environmental sources of motivation.　

The sixth edition has been thoroughly updated throughout and is accompanied by an instructor's manual that contains multiple choice questions, essay questions with answers, websites related to motivation and emotion, power point slides, in-class activities, and discussion questions. It is an essential read for all students of motivation.