Red Desert - Invisible Enemy

Mars hasn't always been red.
Once it was covered by oceans.
It was blue, hospitable, inviting.
Then everything changed, but something remained . . . waiting. Third book in the science fiction series "Red Desert". The joy of finding the small community living in Ophir is soon shattered by the news coming from Houston about the loss of contact with Station Alpha. In fact for more than a day now, no life signs have been detected inside the habitat.
So, together with Jack, Anna sets out for Lun...