Blood Ties. Book 3. Indigo Charms

Sydney managed to regain the trust of her fellow alchemists, but for how long? One wrong step, and she may be suspected of becoming too close to her 'charges' who are vampires. After all, they really get along well. Together,... Sydney, moroi, and dhampirs conduct experiments with rare and mysterious spirit magic, and even the slacker Adrian is trying to get himself together. But soon all the heroes will have to acknowledge that in this world, where vampires are real, other myths can come to life as well.

The second 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 of Blood
Blood Ties. Book 2. Golden Lily
Blood Ties. Book 3. Indigo Charms
Blood Ties. Book 4. Fiery Heart
Blood Ties. Book 5. Silver Shadows
Blood Ties. Book 6. Ruby Ring