Anna Katharine Green's novel, 'The Millionaire Baby', is a masterful example of early 20th-century detective fiction. With a plot centered around the mysterious disappearance of a wealthy baby, Green weaves together suspense, intrigue, and clever detective work in a way that captures the attention of readers from start to finish. The author's detailed descriptions, intricate plot twists, and well-developed characters place this novel firmly within the genre of classic American detective stories. Green's writing style is both engaging and sophisticated, drawing readers into a world of secrets and deception. 'The Millionaire Baby' is a must-read for fans of classic detective fiction looking for a gripping and entertaining story. Anna Katharine Green's expertise in the genre shines through in this compelling novel, making it a standout work in early detective fiction.