Edward L. Deci is one of the world’s leading researchers on human motivation and this book is *packed* with scientific wisdom—exploring what we know about the power of intrinsic motivation (vs. extrinsic motivation), the importance of autonomy (vs. being controlled) and the need for authenticity (vs. alienation). Hint: If you want happiness, focus on relationships, personal growth and making a contribution; don’t go after fame, wealth and beauty.