The Man Who Hated Mars

The Man Who Hated Mars is a space opera written by Randall Garrett, an American science fiction and fantasy author. To escape from Mars, all Clayton had to do was the impossible. Break out of a crack-proof exile camp—get onto a ship that couldn't be boarded—smash through an impenetrable wall of steel. Perhaps he could do all these things, but he discovered that Mars did evil things to men; that he wasn't even Clayton any more.