Anna Katharine Green's novel, "XYZ: A Detective Story," is a classic example of early detective fiction, set in the late 19th century. The book follows the investigation of a mysterious crime by a skilled detective, with intricate plot twists and vividly drawn characters. Green's writing style is characterized by detailed descriptions and a focus on psychological depth, adding complexity to the standard detective story. The novel is often seen as a precursor to the modern detective genre, blending elements of mystery and social commentary. Green's work is a captivating read for those interested in the development of detective fiction and its influence on later works. Anna Katharine Green, known as the "mother of the detective novel," drew on her own experiences as the daughter of a famous lawyer to create realistic legal and investigative scenarios. Her keen observation skills and interest in criminal psychology informed her writing, leading her to produce a series of successful detective novels during her career. I highly recommend "XYZ: A Detective Story" to readers who enjoy classic detective fiction and appreciate the historical context of the genre. Green's contribution to the development of mystery literature makes this novel a must-read for fans of the genre.