The Secret Adversary & N or M? Bundle

The Detection Club was founded in London in 1930 by a distinguished group of British detective fiction writers dedicated to the art of the mystery novel. Its founding members included Agatha Christie, Dorothy L. Sayers, G. K. Chesterton, Anthony Berkeley, and other leading figures of the Golden Age of detective fiction. Chesterton served as the club's first president, and Christie later held that position for nearly two decades. The Floating Admiral brought together fourteen contributors in an extraordinary experiment in collaborative storytelling. Rather than creating separate stories, the writers constructed a single intricate mystery, each adding new complications while respecting the clues established by earlier contributors. The result remains one of the most unusual achievements in detective fiction.