"Admiral John "Jack Black" Geary and the crew of Dauntless have safely escorted important alien representatives to Earth. But before they can depart for home, two of Geary's key lieutenants vanish. The search for the 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."-- back cover

Includes excerpt of Leviathan.