G.K. Chesterton was one of the most prolific writers of the 20th century, writing across numerous genres. His many newspaper columns, his detective stories, his philosophical analysis, and his theological exposition once made him a household name. Though not as well known today, each generation discovers Chesterton anew, and in doing so, finds that Chesterton's writings, even if it is his fiction, apply in their time as well as in Chesterton's time. Chesterton's 1908 clever classic, "The Man Who Was Thursday: A Nightmare," is as good of an introduction into Chesterton as any.