Prison Planet: The Rise of Altura

One in ten. That's how many survived exile to Opheny, the Prison Planet. At first, The Thirty planets sent only vicious and hardened criminals to the Torrid Zone of the planet where they were exposed to savage beasts, warlike tribes, and lethal weather. Because of a political prank gone wrong, Abraham Balador and more than 1,700 companions were sent to the Prison Planet. But he had no intention of dying in the jungle. He had a plan. Balador proposed a march of two thousand miles from the Torrid Zone to the safer temperate lands to the north. But apparently, there exists no safe place on the Prison Planet.