Why do some products capture our attention while others flop? What makes us engage with certain things out of sheer habit? Is there an underlying pattern to how technologies hook us? Nir Eyal answers these questions (and many more) with the hook model - a four-step process that, when embedded into products, subtly encourages customer behaviour. Through consecutive 'hook cycles, ' these products bring people back again and again without depending on costly advertising or aggressive messaging. 'Hooked' is based on Eyal's years of research, consulting, and practical experience