Professor of psychology and marketing at NYU Adam Alter tracks the rise of behavioral addiction, and explains why so many of today's products are irresistible. Then, by reverse engineering behavioral addiction, Alter explains how we can harness addictive products for the good—to improve how we communicate with each other, spend and save our money, and set boundaries between work and play—and how we can mitigate their most damaging effects on our well-being, and the health and happiness of our children.