Lambert Deckers' book "Motivation: Biological, Psychological, and Environmental" is a comprehensive work that explores the various theories and empirical research in the field of human motivation. The text covers topics such as the role of emotions, psychological needs, the influence of the environment, the impact of drugs and physical exercise on motivation, the importance of goals, and the relationship between personality and motivation. The book uses accessible language, which makes it suitable for undergraduate students, and provides a comprehensive overview of the complexity of human motivation.