The Crystal Crypt
by Philip K. Dick
Stark terror led the Inner Flight ship on the final run of Mars Terra. Because those who slept in black were committing adultery... and the gloomy red planet was not far behind. In the distant future, when Earth and Mars are on the brink of war, the last earthlings to leave the red planet are being held by Martian soldiers in search of three saboteurs who destroy the entire Mars city - an event that will quickly lead to a shaky interplanetary conflict.
