"Empire of the Vampire" is a dark fantasy novel by Jay Kristoff, set in a world where vampires have taken control. The story follows Gabriel de León, a vampire hunter, who recounts his life and battles against the undead. The narrative explores themes of faith, sacrifice, and the struggle for humanity in a world dominated by darkness. The novel features a richly developed universe, blending elements of horror and adventure. It includes various characters, such as vampires, hunters, and mythical creatures, all contributing to the intricate plot. The book is known for its vivid imagery and complex storytelling.