A hand-selected team of teens is launched on a 40-year mission to prepare Terra-Two for the people of a dying earth and a second chance-but the traumas and failures of humanity aren't so easy to leave behind. Oh has created a very readable hard sci-fi that manages to put both its characters and the science at the front. Most notable is the sense of long odds and ever-present dread that haunts the crew as they struggle under the weight of tragedy, loneliness, and the nearly incomprehensible length of time they'll have to spend in the darkness.