Described by Ken Follett as 'the first modern thriller', The Riddle of the Sands is the best-known sailing narrative and a true classic. It was recently ranked 37th in The Observer's list of the 100 Greatest Novels of the past 300 years. Winston Churchill even credited it for the Admiralty's decision to build naval bases in Scapa Flow, Invergordon and Rosyth. Following in the adventurous tradition of H Rider Haggard, and being a clear influence on the espionage tales of John Buchan, Ian Fleming