Night's Black Agents by Kenneth Hite

A hard‑boiled espionage sourcebook that turns spy campaigns into vampire‑hunting thrillers: players take the roles of former intelligence operatives investigating and sabotaging a sprawling, secretive vampiric conspiracy. It blends investigative mechanics, tradecraft and action‑oriented scenes, providing tools and frameworks to run campaigns that range from gritty procedural sleuthing to cinematic covert ops, with paranoia, moral ambiguity and dwindling resources driving tense choices and dramatic consequences.