The Walls of the UniverseJohn Rayburn thought all of his problems were the mundane ones of an Ohio farm boy in his last year in high school. Then his doppelg nger appeared, tempted him with a device that let him travel across worlds, and stole his life from him. John soon finds himself caroming through universes, unable to return home the device is broken. John settles in a new universe to unravel its secrets and fix it. Meanwhile, his doppelg nger tries to exploit the