The Vampire Academy Series by Richelle Mead is a group of 6 books that are about a girl, Rose Hathaway, who is a Dhampir, a sort of half vampire. The Dhampirs protect the Moroi, who are mortal vampires from the Strigoi, evil made vampires. The Moroi only drink from volunteers but the Strigoi kill, and want Moroi blood most of all.
The Dhampirs have the strengths of both humans and Moroi, they are stronger than both and can still walk in sunlight. So the Dhampirs work as bodyguards for the weaker Moroi, who can do magic but do not use it anymore for battle or even defense.
Additionally, each Moroi specializes in a certain field of magic - fire, water, air or earth, they are born that way and it can't be changed.
Lissa Dragomir is Rose's best friend and a Moroi. The oldest member of each of the old Moroi families bears the title of prince or princess. After Lissa's parents and older brother died in a car crash she becomes the Dragomir princess. Lissa and Rose were also in the crash but Lissa survived and used her magic, Spirit, a previously unknown magic to revive her best friend, a fact that neither of them realize until years later.
Because of this they have a special bond and Rose can hear Lissa's thoughts. Because Rose is shadow kissed, that is, she has been brought back from the dead, she can see ghosts. A year before the first book, a teacher that later went missing, had warned the girls that Lissa was in great danger and so they fled. They are tracked down at the very beginning of the book and returned to the Academy.
The Academy is a boarding school where all young Dhampir and Moroi children are sent to in order to protect them from the Strigoi, situated in rural Montana. They soon realize that someone is after Lissa, but they don't know why. At the same time Rose is also falling for an older Dhampir slash teacher, Dimitri Belikov. Lissa befriends outsider Christian Ozera, but Rose doesn't trust him and that causes tension between the besties.
Other main characters introduced at various times in the Vampire Academy Series books include, Adrian Ivashkov, a filthy rich royal bachelor, Victor and Natalie Dashkov, Lissa's relatives, Tasha Ozera, Christian's aunt and many more. There are a total of six books, and the main theme in all of them is the Moroi's return to using defensive magic and the bad treatment of both Dhampirs and lower-class Moroi by the royals.
It can also be seen as coming of age story, as Rose greatly matures during the course of the books. The books included in this series are: Vampire Academy, Frostbite, Shadow Kiss, Blood Promise, Spirit Bound and Last Sacrifice. I highly recommend these books in the Vampire Academy Series to anyone over the age of 13.
"The world changes, we do not, there lies the irony that finally kills us." -- Armand, Interview with A Vampire