The Floating Admiral is a collaborative detective novel written by members of the Detection Club in 1931. The contributors included G. K. Chesterton, Agatha Christie, Dorothy L. Sayers, Ronald Knox and Freeman Wills Crofts.
As Sayers explained in the introduction to the book, "Each writer must construct his installment with a definite solution in viewthat is, he must not introduce new complications merely 'to make it more difficult' ... Each writer was bound to deal faithfully with all the difficulties left for his consideration by his predecessors."