BRIDE OF THE RAT GOD by Barbara Hambly
This is one of those guilty pleasures that is totally legitimate but would make me blush if anyone caught me reading it in public. The title alone is bad enough. Repeating the plot doesn't redeem it much: an ancient cursed necklace worn by a 1923 Hollywood movie star condemns her to death by a demon (the Rat God itself). She must deal with this and much more ... explosions, cryptic omens, people who refuse to die even when their skulls are cracked open, and a mysterious Chinese wizard. This combines the hokiest elements of an old Hollywood movie with the great writing and characterizations that Barbara Hambly is known for. The characters are clever enough to know the story they are living is totally unrealistic but realize that doesn't matter much when being stalked by a giant rat-demon. This is the kind of light reading that is perfect for the beach or just to forget a hard day at the office, which is why I pick it up time and again. Hambly has written many other great books but they don't hit that "guilty pleasure" meter by virtue of being set in parallel universes. You might not take this out of the house but you will thoroughly forget where you are and enjoy every second spent with Chrysande Flamande eluding the Rat-God.