In this provocative exploration of human behavior, behavioral economist Dan Ariely investigates why people lie, cheat, and deceive—often more than they realize. Drawing on a series of ingenious experiments, Ariely reveals how factors like conflicts of interest, creativity, social norms, and even fatigue influence our moral flexibility. Combining science, humor, and storytelling, the book challenges readers to confront the hidden forces behind everyday dishonesty and understand how we justify our actions to ourselves and others.