Bloodlines (Richelle Mead)

The first book in Richelle Mead's New York Times bestselling Bloodlines series
When alchemist Sydney is ordered into hiding to protect the life of Moroi princess Jill Dragomir, the last place she expects to be sent is a human private school in Palm Springs, California.
Populated with new faces as well as familiar ones, Bloodlines explores all the friendship, romance, battles, and betrayals that made the #1 New York Times...

As Marcus Finch tries to convince her to rebel against the people who raised her, Sydney Sage, an alchemist who serves to bridge the worlds of humans and vampires, searches for an evil magic user targeting powerful young witches.

In the aftermath of an event that ripped their world apart, Sydney and Adrian struggle to pick up the pieces and find their way back to each other. But first, they have to survive.