The Fifth Man by Randy Ingermanson
Approx. 139,600 words.
Published on May 25, 2012.
(3.50 from 2 reviews)
Valkerie Jansen is tough, beautiful, and being pursued by every man on the planet. Literally. The planet in question is Mars, with a total population of four. Days before a giant dust storm is projected to strike their camp, Valkerie is attacked by an unseen assailant. Fortunately, there are only three suspects. Unfortunately, all three of them . . . are innocent.