I just finished Melvin Burgess' book Bloodtide (call no. is YP FIC BURGESS for those who may be interested...) It is a fast-paced science fiction-ish novel set in a destroyed London of the future. Ganglords have taken over the city, which the rest of the world has abandoned.
Mankind has figured out how to create a race of super-strong, half-human, half-animal beings called the Halfmen, who have turned against mankind and live just beyond the walls of ruined London. The book centers around a set of twins who have a mystical connection to the Norse god Odin. The twins try to reclaim their city, but both must struggle with powerlust, their own innate "racism" towards the Halfmen and the question of how to maintain their hope in a hopeless environment. The author based the book on an old Icelandic myth. It was hard to put down.
If you liked the movie Children of Men (which we also have at the library - DVD CHILDREN) or Scott Westerfeld's Uglies books (YP FIC WESTERFE) take a look at this one, too.