The Blood Pit (Wesley Peterson Series #12)

Never has DI Wesley Peterson witnessed such a bizarre crime scene. The victim, Charles Marrick, has been murdered, his body drained of blood. Described by those who knew him as 'evil', it seems that Wesley isn't going to have any shortage of suspects - until a popular local vet is murdered in an identical fashion...and a third body is discovered many miles away.

And when Wesley's archaeologist friend, Neil Watson, starts getting disturbing anonymous letters written in gory detail about macab...