"This might be Hautman's most daring book yet. . . . Well-developed and complex characters, a fascinating time-travel framework, and a heart-stopping conclusion." - Publishers Weekly (starred review)

Tucker Feye's family has disappeared. He suspects that the disks of shimmering air he keeps seeing - one right on top of the roof - hold the answer to finding them. But when he dares to step into one, he's launched on a time-twisting journey - from a small Midwestern town to a futuristic hospital run by digitally augmented healers, from the death of an ancient prophet to a forest at the end of time. Inevitably, Tucker's actions alter the past and future, changing his world forever. The first in a riveting sci-fi trilogy by National Book Award winner Pete Hautman.