Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Vikirnoff and Natalya's Story

Natalya is a vampire slayer who is the lifemate of Carpathian Vikirnoff. Natalya's evil grandfather is a sorcerer that may or may not be dead. Natalya is a strong warrior with magik in her blood and Vikirnoff is an ancient hunter. Together they fight demons and vampires and discover the truth about Natalya's lineage.