Hooked by Nir Eyal is a practical guide to building products that capture users? attention and create habit-forming experiences. Drawing on behavioral psychology and real-world examples, the book explains the ?Hook Model,? a four-step process?trigger, action, variable reward, and investment?that drives user engagement. Designed for entrepreneurs, product designers, and marketers, Hooked provides actionable strategies to create products that people return to again and again, ethically shaping behavior while fostering lasting user habits.