Vampire Academy by Richelle Mead

Lissa Dragomir is a Moroi princess: a mortal vampire with a rare gift for harnessing the earth’s magic. She must be protected at all times from Strigoi; the fiercest vampires – the ones who never die. The powerful blend of human and vampire blood that flows through Rose Hathaway, Lissa’s best friend, makes her a dhampir. Rose is dedicated to a dangerous life of protecting Lissa from the Strigoi, who are hell-bent on making Lissa one of them.

After two years of freedom, Rose and Lissa are caught and dragged back to St. Vladimir’s Academy, a school for vampire royalty and their guardians-to-be, hidden in the deep forests of Montana. But inside the iron gates, life is even more fraught with danger… Read more.