The Coldest Girl in Coldtown by Holly Black, 419 pages

This was a darkly delicious vampire story, featuring a world with vampires exist in walled off cities, with humans allowed to enter but never leave. Tana rescues an ex-boyfriend, a chained up vampire, and possibly herself in the start of what promises to be a life-changing event.
Holly Black has created a new twist on the vampire story, that is sure to sink it's teeth into readers.