The Night Eternal is book three in the trilogy. This is a vampire trilogy. The ending of the last book leaves the Master, a source of a blood borne parasitic infestation with vampire like symptoms, and has almost total control over the world. His followers have set up concentration camps that are dedicated to harvesting blood. The remaining humans wait in terror for their capture and transport to the concentration camps.
Abraham Setrakian, the old-world vampire hunter who has been trailing the Master for decades, is dead, and Dr. Ephraim Goodweather, the epidemiologist who first understood the nature of the new threat, now spends most of his time in a pill-induced haze, pining for his lost son, who, though still human, is under the Master’s thrall. There remains some resistance, vampire hunter “Gus” has set up base in the now unused Columbia University campus, and exterminator Vasiliy Fet is working to translate an ancient, silver-bound book that Setrakian seemed to think contained the knowledge necessary to destroy the Master for good. When Dr. Nora Martinez, Goodweather’s former colleague and lover who is now attached to Fet, is taken to a blood camp, Goodweather, Fet and Elizalde, along with the mysterious half-vampire Mr. Quinlan, must come together to free her, and then to find a way to end the Master’s reign once and for all.
Highly recommend the entire trilogy, horrifying read.