The darkness outside us
(Book)

"Earth's population is divided between only two existing countries which cannot manage to cooperate in any way, until a distress signal arrives from Titan's first settler and neither can afford to rescue her on their own if they act separately. Ambrose wakes up on board with successfully reaching his sister the primary thought in his mind until he notices several strange circumstances: he doesn't remember the launch, the ship's OS is voiced by his mother, strangers have been aboard, and the only other person on this mission has barricaded himself away from sight. It's quite possible he won't be able to puzzle out these occurances on his own, but even in learning to work together, it's just as possible that Kodiak and Ambrose are up against bigger forces than they could have even imagined." --,(Source of summary not specified)