I have to credit this one for achieving an effective plot and a directness of telling that made it both easy to follow and enjoyable to listen to. I would like to hear more stories like this.
However, as much as I enjoyed its unabashed "pulpiness" I am not a fan of the "hardboiled" or "punchy" "Paranormal Private Eye" stories. They all seem to have sprung up around the same time Laurel K. Hamilton's nonsense took off and I just don't find them that interesting. The protagonist is always the same (hard-bitten, down on his/her luck, no-nonsense - a bad noir pastiche basically). The situation is always the same: stop monster, but carry it out like you were investigating a serial killer.
So, it may be personal bias speaking here, but while I liked the way the story was told - the actual language and subject matter I found a little dull and uninspired. Also, I agree with a lot of people here: for a supposedly competent protagonist and antagonist, they both make a lot of dumb mistakes. I might be able to buy that in Conan, but not here.