The Psychoneurotic Vampire — Maynard Allington

A young commercial artist, fearing he may have been responsible for the deaths of 3 women, approaches PI Rich Hazzard for help. His bizarre story stretches back more than a century to the impressionist era in Paris and involves a young woman with an equally strange past. Why are they both still alive and physically unchanged?
Listening to the artist, Hazzard is left to wonder if he is delusional, or the victim of an elaborate medical conspiracy. The man's mind is full of shadows and aborted experiences that often seem only half real.
Hazzard's investigation will take him from Paris to a mysterious clinic in Geneva, and finally to a remote chateau in the Bernese Alps where he will discover the truth that nearly costs him his life.