Kat Richardson’s enormously popular Greywalker paranormal investigations series is now a fixture on the New York Times best-seller list. In her fourth adventure Seattle PI Harper Blaine delves into her own past and makes some shocking discoveries. It seems that before her father committed suicide he had witnessed some bizarre supernatural events. With barely any time to process this new info Harper is pressured by a group of vampires into an investigation in London—where old foes and more revelations await.