It's a really good read. Along with being a very original plot, it plays around with formatting and design.
It's about a photojournalist who is making a documentary about his family settling into a new house. He sets up motion-detector cameras in every corner of the house and, after returning from a vacation, there is a closet where there wasn't one before. Nothing set off the motion detectors while they were gone. So the guy checks the original blueprints of the house and measures everything, inside and out, and finds that the inside of the house is larger than the outside. It all goes downhill from there.