The Instinct Series16 books in series
Killer Instinct Publisher's Summary
DR. JESSICA CORAN
A brilliant and determined FBI medical examiner, she was an expert student of the criminal mind who thought she could face anything.
That was before Wisconsin. Before she saw one of his victims...
THE VAMPIRE KILLER
The FBI agent had a special code name for his unusual method of torture: Tort 9, the draining of the victim's blood. The newspapers called him the Vampire-Killer. But his own twisted love letters were signed "Teach"... and were addressed to the one woman he wanted most of all: His hunter, his prey, Dr. Jessica Coran.