Why can't you put your phone down? It's not a lack of willpower; it's design. You are fighting against an army of PhDs and behavioral psychologists whose sole job is to keep your eyes glued to the screen. "Built to Addict" exposes the psychological triggers Silicon Valley uses to hijack your dopamine receptors and turn you into a user—in every sense of the word. We deconstruct the "Hook Model": Trigger, Action, Variable Reward, and Investment. It starts with an external trigger (a notification) or an internal one (boredom). You take an action (scrolling). Then comes the variable reward—maybe a like, maybe a funny video, maybe nothing. This uncertainty is what makes it addictive, just like a slot machine. Finally, the investment phase: you upload a photo or leave a comment, locking you deeper into the ecosystem. This book is a manual for two groups of people. For product designers, it offers the blueprint to build engaging, habit-forming technologies that people love to use. For users, it is a wake-up call and a shield. By understanding how you are being manipulated, you can regain control. Learn to break the loop, turn off the triggers, and reclaim your attention span. The technology is neutral, but the design is not. Understand the game so you can stop being a pawn.