Thousands of urban book boxes, sharing shelves, and swap corners exist across our cities, built by citizens, for citizens, with no budget and no coordination. Yet each one is an island. Nobody knows what's inside, who maintains them, or what's happening nearby.Community in a Box connects these objects into a living neighborhood network. Scan a box, find a book, discover a local event, offer a skill, meet a neighbor. No app, no platform, no friction. Just a sticker, a code, and the street around you.The first step toward cities that can see and strengthen what their citizens have already built.