"... Three astronauts train for the first-ever mission to Mars, an experience that will push the boundary between real and unreal, test their relationships, and leave each of them--and their families--changed forever... In four years Prime Space will put the first humans on Mars. Helen Kane, Yoshi Tanaka, and Sergei Kuznetsov must prove they're the crew for the job by spending seventeen months in the most realistic simulation ever created... As the days turn into months the line between what is real and unreal becomes blurred, and the astronauts learn that the complications of inner space are no less fraught than those of outer space..."--.
