Here Be Demons

Description for HERE BE DEMONS by Esther Friesner:

THE ROAD TO HELL IS PAVED WITH BAD INTENTIONS...

But intentions alone are not enough. Hell hates a failure, and the archdemon Atamar has just not been pulling his weight in the competitive world of bad deeds, rotten behavior and the corruption of mortal souls.. So he and his team of junior demons have been put on probation---thrown out of the comforts of Hell into the realm of the living. They won't be allowed back until they've collected a fat bonus of innocent souls, fully corrupted and ready to drag down to the Devil himself.

Unfortunately Atamar has landed in the desert, miles from the nearest known sin---until a team of American archeology students arrives for a summer dig. And when the gleeful demons descent to do their worst, they discover that their idea of bad deeds is sadly out of date---at least when the youth of America is involved!