Chromosome 4: a Science Fiction, Science Fiction Thriller

A science-fiction action thriller set aboard a luxury spaceship on course from Earth to Moon.

Roger and Paula Winston seem to be two happily married space tourists on a romantic trip of a lifetime. However, when they are drawn into what appears to be a random act of violence, Roger and Paula reveal themselves as figures in an elaborate con game to sell pharmaceutical secrets to a dirty government official. In this riveting pulse-pounding story things are never what they seem, and anyone could be in on the con.

Think Philip K. Dick blended with Michael Crichton.