Considered by many to be the most balanced and unbiased presentation of motivation currently available, Petris new edition continues to cover the biological, behavioral, and cognitive explanations for human motivation. Contemporary topics such as sexual behavior, aggression, eating disorders, obesity, hedonism, achievement, and actualization capture and keep students interest. And, Petris broad range of topics includes sufficient detail, recent references, and suggested readings. This allows instructors the flexibility to focus on a few topics in-depth or take a broader approach to motivation.