Carmilla, by J. Sheridan Le Fanu, narrated by Megan Follows
Spoilers. Sorry. :( It's hard to discuss a book well without spoilers.
Despite the very modern look of this cover, this novella is one of the first vampire books, predating Bram Stoker's Dracula by 26 years. It was a serial story published in the magazine The Dark Blue from 1871 to 1872. Carmilla is narrated by a sweet, lonely girl named Laura, who is stuck with her father in a castle far from any company. She is eagerly expecting the arrival of a new friend, ward of her father's friend General Spielsdor. Just before their expected arrival, a letter informs Laura and her father that the girl has died suddenly, and the General is on a quest to discover the murderer.