Thomas Kilbride is a schizophrenic who spends his days and nights on a Web site called Whirl360. He travels the world without ever leaving his bedroom and memorizes the details of every street in every city. Then one day, he sees an image that looks like a woman being murdered in a window in New York City. Thomas’s brother, Ray, knows Thomas’s paranoia all too well. But if this time it’s real, both of them will have more to deal with than Thomas’s delusions. Because someone somewhere is watching them.…