Book · Book (~256 pages)

Hooked: How to Build Habit-Forming Products

Nir Eyal (with Ryan Hoover) · Portfolio / Penguin (nirandfar.com) Paid Intermediate

The definitive framework for building products people return to without paid nudges, the Hook Model, backed by a million-plus copies sold and used across top consumer products.

• The Hook Model: Trigger, Action, Variable Reward, and Investment.
• Reduce friction on the action and boost motivation to form habits.
• The 'investment' step makes the product better on each return, compounding retention.