Children are not guinea pigs, living and dying as a result of the experiments they have no control over.

A devious plot threatens to overtake the spaceship Moon Racer as Tyce, Ashley, and the crew near the end of their six-month journey from Mars to Earth. Who’s the rebel mastermind? Could it be one of the six other people on board? In a race against time Tyce must find out or the Moon Racer–and everyone aboard–is doomed to crash into the sun!

Book 6, Mars Diaries series — teen science fiction.