It's the year 3,046 and 16-year-old River-Jo York Safar lives in Skyopeia, a seeming paradise in the sky. People have been able to live there since the scientists at the Centralized Leadership Of United Development (C.L.O.U.D) figured out that pouring chemicals on the clouds would make them harder and bounceable. Up in the sky, there's less gravity, and everything seems to float just a little bit. All River-Jo has ever known is C.L.O.U.D making everyone's...