From the Bookshelf of Dangerous Hero Addict Support Group…

[close] Raphael, the title character, is basically the 'king' of vampires - what he doesn't literally control, he very nearly does by proxy simply because his power is so enormous. So when one of his people is kidnapped, he's justifiably furious. However, there's clearly a human element in the mix, and it's been a few (hundred) years since he's been human, so he hires this private investigator who's actually willing to stand up to him...