The Awakening by L. J. Smith is the first book in the Vampire Diaries series.
The Awakening is about Elena, the school beauty. She's bored, until a new boy turns up in her class. Stefan is dark and mysterious - and she's determined to get to know him better. But Stefan is just as determined to resist her ... until a series of attacks in the area terrify the town and Stefan is held responsible. Elena is the only one who offers to help and, falling in love with her, Stefan tells her his terrible story. He is a vampire, on the run from his evil brother, Damon, who doesn't share Stefan's qualms about drinking human blood. And Damon is the one Stefan suspects of really being behind the recent attacks.
Despite this book being more of a romantic paranormal book (than I would normally read), I still enjoyed it. It was well written and well thought out. Elena was my favourite character (which was probably because most of the book was written from her perspective!) and because even though she wasn't a vampire herself, she still manages to hold her own against the them.
Available at Amazon.co.uk.