Vampire Academy by Richelle Mead

Lissa, a Moroi Vampire Princess, and her best friend Rose, a Dhampir have been found by the Guardians and forcibly returned to St. Vladimir's Academy. As a mortal Moroi, Lissa is highly coveted by the Strigoi, the evil immortal vampires, the race that Dhampirs like Rose train to fight as Guardians. Lissa and Rose have a remarkable bond, and Lissa's power is so rare in the history of Moroi that it has largely been forgotten. Rose is determined to protect Lissa at all costs, only first she needs to figure out who and what she is fighting. The first installment in this new Vampire series is full of action, suspense, romance, and teen angst that will keep readers engaged and involved in the story. A well developed cast of characters with interesting stories capture the attention of readers. A perfect new series for mature fans of vampire novels- they will devour this and immediately begin clamouring for its sequel Frostbite.