The Man Who Hated Mars: A Short Story/Science Fiction Classic By Gordon Randall Garrett!

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. He was only--THE MAN WHO HATED MARS.