Blood Ties. Book 1. Princess by Blood

Sydney Sage belongs to a family of alchemists, which means she has been prepared since childhood to protect mortals from vampires. "To protect" means to keep the very existence of bloodsuckers a secret. But when the political situation among the... vampire aristocrats of the Moroi becomes shaky, this secret is put at risk. Sydney is given a new assignment, despite almost losing the trust of her allies. This might be her last chance to prove herself. She needs to accompany and protect the Moroi princess.

The first book in the "Blood Ties" series, expanding the legendary universe of the "Vampire Academy," in a convenient classic pocket format.
 
Blood Ties. Book 1. Princess by Blood
Blood Ties. Book 2. Golden Lily
Blood Ties. Book 3. Indigo Charm
Blood Ties. Book 4. Fiery Heart
Blood Ties. Book 5. Silver Shadows
Blood Ties. Book 6. Ruby Ring