The Catacomb Conspiracy in Bloomington, MN

Penny Spring's Rome vacation is seriously disrupted with two murders, a kidnapping, and odd noises and goings-on in and around their holiday villa, perched above an unexcavated catacomb.
Vacationing at a friend's Roman villa, anthropologist Penny Spring and her archaeologist friend, Sir Toby, become caught up in the murder of the villa's caretaker.