Day Keene was one of the most prolific, most popular authors of American detective fiction. His first books appeared in the forties. Like many of his colleagues, he produced novel after novel with astonishing speed. The critic considers the main advantage of the writer to be a precise sense of the rhythm of the narrative: Day Keene knows how to construct a plot in such a way that the reader is intrigued from the first pages to the very end. The writer's best novels are fascinating and masterful. They can be classified as classics of the American detective story.