Mars Prime: William C. Dietz

Outward Bound was the second colony ship being sent to Mars by an Earth in dire need of more living space and raw materials. It was only natural for Rex Corvan, Earth's top reporter, and his wife Kim - a whiz at computers and news editing - to be included on this one-way expedition to a new life. The reports they would send back would fuel Earth's excitement and ensure that more expeditions to the Red Planet. But no-one - including Rex - counted on the scoop he was about to uncover. Somewhere about the Outward Bound was a serial killer, a split personality driven by the urge to slay again and again. And when Rex and Kim stumble on the clues that will lead to the killer's unmasking, the killer knew they would be the next to die...