I feel like I have been waiting for this book forever! This is book 2 in a series- book 1 was titled Infinite Days and I loved it. (Review here). This was about a 592 year old ruthless vampire queen, who gives up her immortality and rejoins the human race as a 16 year old high school student. Clever, dark and romantic.
The sequel is Stolen Night by Rebecca Maizel and is published in the UK in July 2012.