 The first title in the series was The Frog with the Mask from Edgar Wallace, who along with Agatha Christie, initially dominated the series.Later came Victor Gunn, Arthur Upfield and Thomas Muir, and even later, Francis Durbridge and Rex Stout.Other well-known recurring authors were Louis Weinert-Wilton, Earl Derr Biggers, John Creasey, Ellery Queen, Dick Francis and Bill Knox.