Oliver Dalrymple, nicknamed "Boo" because of his pale complexion and staticky hair, is an outcast at his Illinois middle school--more interested in biology and chemistry than the friendship of other kids. But after a tragic accident, Boo wakes up to find himself in a very strange sort of heaven: a town populated only by 13-year-old Americans. While he desperately wants to apply the scientific method to find out how this heaven works (broken glass grows back; flashlights glow without batteries; garbage chutes plummet to nowhere), he's confronted by the greatest mystery of all--his peers. With the help of his classmate Johnny, who was killed at the same time, Boo begins to figure out what exactly happened to them (and who they really were back in America) through this story about growing up, staying young and the never-ending heartbreak of being 13.