Nir Eyal writes, consults, and teaches about the intersection of psychology, technology, and business. Eyal founded two tech companies since 2003 and has taught at the Stanford Graduate School of Business and the Hasso Plattner Institute of Design at Stanford. He is the author of the bestselling book, “Hooked: How to Build Habit-Forming Products,” and the forthcoming “Indistractable: How to Master the Skill of the Century.” Eyal blogs at Nirandfar.com.