Dark Salvation by Jennifer Dunne

"Desmond Lacroix is on the front lines of battle between science and magic, with the life of his young daughter at stake. When investigative reporter Rebecca Morgan tries to expose him, she is drawn into the battle... and into his bed. Will she save the girl only to become a bloody sacrifice herself?" (from back cover)

Paperback Info: ISBN 0759904014, Hard Shell Word Factory, 2001