The trouble with Tycho

Prospecting on the moon was grim, dangerous, and usually unrewarding ... only most of the greenhorns who came to try didn't find out until after they got there. Chris Jackson was no exception. He had put everything he owned and could borrow into this, and he'd be ruined if he failed. His only chance meant going into Tycho — where three expeditions had already disappeared. He could try ... but would he come out again?