"The Instrumentalities of the Night" is a fantasy novel by Glen Cook, part of the Garrett P.I. series. It follows the adventures of Garrett, a private investigator in a world filled with magic, monsters, and political intrigue. The story combines elements of mystery and fantasy, showcasing Cook's unique blend of humor and dark themes. In this installment, Garrett navigates a complex web of crime and supernatural forces while seeking to solve a series of murders. The narrative explores themes of loyalty, betrayal, and the moral ambiguities of its characters, all set against a richly developed backdrop of a fantastical city.