The Martian Enigma

When a return probe to Mars brought back what appeared to be a piece of bone, the pressure was on to get a manned mission to Mars to investigate the site of the discovery. But the first two crews to visit the planet disappeared without a trace. The third attempt, left nothing to chance, the crew were prepared for any eventuality – or so they hoped. The discoveries that they made were beyond what anyone could have anticipated. And the implications of what was being constructed on Mars were Earth-Shattering.