The 39 Steps is a parody play adapted from the 1915 novel by John Buchan and the 1935 film by Alfred Hitchcock. The original concept and production of a four-actor version of the story was written by Simon Corble and Nobby Dimon, and premiered in 1996. Patrick Barlow rewrote this adaptation in 2005.

The Thirty-Nine Steps is a 1915 adventure novel by the Scottish author John Buchan, first published by William Blackwood and Sons, Edinburgh. It was serialized in All-Story Weekly issues of 5 and 12 June 1915, and in Blackwood's Magazine between July and September 1915, before being published in book form in October of that year. It is the first of five novels featuring Richard Hannay, an all-action hero with a stiff upper lip and a knack for getting himself out of tricky situations.