THE INTERNATIONAL BESTSELLER | OVER 500,000 COPIES SOLD WORLDWIDE Why do some products capture our attention while others fade into obscurity? What makes us check our phones, open an app, or scroll a feed without even thinking? Is there a repeatable pattern behind how technology hooks us? In Hooked, Nir Eyal reveals the secret psychology behind the world's most engaging products. Introducing the groundbreaking Hook Model - Trigger ? Action ? Variable Reward ? Investment - Eyal uncovers how products from Apple, Twitter, Instagram and Google create lasting user habits and how you can ethically harness these principles to build products people love. Packed with cutting-edge behavioural science, case studies, and practical frameworks, Hooked is both a manual for product designers and a mirror for anyone curious about their own habits. 'Hooked changed my life. It's essential reading for anyone who wants to better understand their actions and habits' Steven Bartlett, Diary of a CEO 'Nir Eyal taught Silicon Valley how to design behaviour - and then reminded us to use that power responsibly; Mark Manson, Solved Podcast 'Our challenges go beyond technology; they stem from the internal discomfort that Nir Eyal's work helps us understand' Ali Abdaal, Deep Dive Podcast 'In Hooked, Nir Eyal shows the fine line between persuasion and coercion - and why ethical design matters more than ever' Jim O'Shaughnessy, Infinite Loops Podcast