Damsel by D. J. Bershaw

Red-haired detective Lee Hardy is hired to impersonate a wealthy young woman kidnapped and held for ransom by neo-Nazis in Banff, Canada. Danger she expects, but not Vampires, Fallen Angels, Neanderthals, and a very large man with an axe. At least the Mounties are on her side, but are they really? And why won't that kid leave her alone? "The Prisoner of Zenda" had it easy.