Tanglewreck by Jeannette Winterson

Silver is kept locked up in her house, Tanglewood, by her cruel guardian Mrs. Rokebye. Her parents and sister have disappeared, she doesn't get enough to eat, and she is always watched by Mrs. Rokebye's rabbit, Bigamist. The only thing that keeps her going is the house, Tanglewreck, which sometimes talks to her.
Suddenly the world goes wrong. Time isn't what it used to be- or perhaps it will not be what it is, or it isn't what it will be. People are disappearing, flung across time and space, and the only thing that can set things right is the Timekeeper, which Silver is supposed to have. Only two other unscrupulous persons want it very badly, and they are prepared to do anything to get it, sending Silver into a wild journey to save Time... and the world itself.

Good. Time is a confusing thing to write, and writing it suddenly opens the story up to countless possibilities. I read of Queen Elizabeth, the Prime Minister, Jamaica, black holes, wormholes, both Vaticans, and London, all of which happened in the space of a few days. Winterson managed it very well; I was completely caught up in the story.

Merry Christmas!! Yay for presents from Barnes and Noble!