"Elusion Aforethought" provides significant new material on the work of crime and detection fiction writer Anthony Berkeley Cox, a popular and prolific English journalist, satirist, and novelist in the period between World Wars I and II. Cox has been called one of the most important and influential of Golden Age detective fiction writers by such authorities as Haycraft, Symons, and Keating, yet he occupies a surprisingly ambivalent position in the history of the crime genre.