Carmilla : The cult classic that inspired Dracula by Sheridan Le Fanu

In an isolated castle deep in the Austrian forest, Laura leads a solitary life with only her ailing father for company. Until one moonlit night, a horse-drawn carriage crashes into view, carrying an unexpected guest - the beautiful Carmilla. So begins a feverish friendship between Laura and her mysterious, entrancing companion.

But as Carmilla becomes increasingly strange and volatile, prone to eerie nocturnal wanderings, Laura finds herself tormented by nightmares and growing weaker by the day... Pre-dating Dracula by twenty-six years, Carmilla is the original vampire story, steeped in sexual tension and gothic romance.
 
Carmilla, serialized in the literary magazine The Dark Blue in late 1871 and early 1872 was reprinted in Le Fanu's short-story collection In a Glass Darkly (1872).