Steadfast

Science fiction. Geary and the crew of the Dauntless have managed to safely escort important alien representatives to Earth. But before they can make tracks for home, two of Geary's key lieutenants vanish. The earch for his missing men leads Geary on a far-flung chase, ultimately ending at the one spot in space from which all humans have been banned: the moon Europa. Any ship that lands there must stay or be destroyed-leaving Geary to face the most profound moral dilemma of his life