Percy F. Westerman (1876–1959) was one of the most popular writers of boys’ adventure stories from the 1920s to the 1950s. In their brightly coloured dust-jackets his historical tales – books about the Great War or the early days of aviation – sold in their thousands, and in the Thirties he was acclaimed as the most popular boys’ author in a referendum run by the Daily Sketch. By the time he died he had written nearly 200 books, which had been translated into many languages, and achieved sales of one and a half million copies. Many readers of Slightly Foxed will remember the excitement they felt when they first encountered the exploits of Standish, the flying detective, in such tales as The Amir’s Ruby (1932) or Standish Gets His Man (1938).