The Floating Admiral
The Detection Club, Agatha Christie, Dorothy L. Sayers, G. K. Chesterton, Canon Victor L. Whitechurch, G. D. H., M. Cole, Henry Wade, John Rhode, Milward Kennedy, Ronald Knox, Freeman Wills Crofts, Edgar Jepson, Clemence Dane & Anthony Berkeley
Ask a Policeman
The Detection Club, Agatha Christie, Martin Edwards, John Rhode, Helen Simpson, Gladys Mitchell, Anthony Berkeley, Dorothy L. Sayers & Milward Kennedy
Six Against the Yard
The Detection Club, Margery Allingham, Ronald Knox, Anthony Berkeley, Freeman Wills Crofts, Russell Thorndike & Agatha Christie