" For the burglar, every building is infinite, endlessly weaving back into itself through meshed gears made of fire escapes and secondary stairways, window frames and screened-in porches, pet doors and ventilation shafts, everything interpenetrating, everything mixed together in a fantastic knot. Rooms and halls coil together like dragons inside of dragons or snakes eating their own tails, rooms opening onto every other room in the city. For the burglar, doors are everywhere. Where we see locks and alarms, they see M. C. Escher. "

― , A Burglar's Guide to the City