Seventh in simon r green's nightside series. These involve John Taylor, a private detective with psychic powers, who lives and works in the nightside. This is a part of london off the beaten tracks, a horror/fantasy world full of strange creatures and individuals.
The last three books in the series all formed part of an ongoing storyline, but that finished in book six and this one pretty much stands alone, so would be easily accessible to new readers. John is hired by the griffin, an immortal man who wants to take control of the nightside, to find his niece, who has gone missing. He proceeds to investigate the situation, and tours the nightside dealing with strange places and people on the way, and finding a few more things than he bargained for about his client in the process.
A short book of no more than 270 pages, told in the first person, with very readable prose. If you like a good bit of readable fantasy that's not a tolkein clone, then this will appeal. It's a little disappointing that one regular character is off stage till the last chapter, but that probably suits the needs of the story fine. Another entertaining entry in an entertaining series