Blood Price - a blast from the past
The existence of vampires and demons in Toronto suggests that Blood Price fits into the urban fantasy genre but since it was published in 1991 it predates the tropes associated with that genre. Vicki Nelson was an amazing homicide detective until she started losing her sight so she left the force and got her license as a PI. One night she's at the subway station when an impossible murder takes place. It is part of a series of brutal serial killings that the press call the Vampire Murders even though everyone knows that's impossible. Henry Fitzroy is the bastard son of Henry VIII, a vampire, and romance novelist who wants to stop the killer because he doesn't want to face the modern equivalent of a pitchfork wielding mob. The killer is actually something worse than a vampire, a demon, and it will take Vicki's investigative skills and Henry's supernatural powers to stop it from releasing Hell on Earth.