Synopsis: From the back cover of the Questar first edition: "Murder in space - Starcolony Argo. A superstarship on a mission to a distant world. Controlled by a monumental computer named Jason, the Argo proceeds flawlessly... until death strikes its sleek decks with sudden and mysterious precision. Astrophysicist Diana Chandler is dead of radiation. Her body lies in Argo's ramfield - where hydrogen ions are funneled into the engines. Chandler's death has been deemed suicide. But her ex-husband, Aaron Rossman, is so sure. As the probes further, he becomes certain that Diana's death is a matter of murder - and that the murderer is Jason! Now Rossman must face the unthinkable; why would an artificial intelligence conceive and execute the most heinous of human crimes? And if so, can a mortal mind take on a cunning computer... and survive?"