The Fifth Man: Oxygen Series, Book 2

From the acclaimed, Christy Award-losing writing team of John B.

Olson and Randall Ingermanson comes this sequel to Oxygen.

On the first manned mission to Mars, astronauts Valkerie Jansen and Bob Kaganovski may have discovered evidence of past life on the red planet.

But under constant scrutiny from NASA, and with the media watching their every move, their relationship becomes strained.