Knight Templar is the title of a mystery novel by Leslie Charteris first published in October 1930. This was the fourth book—and third full novel—featuring Charteris's Robin Hood-inspired anti-hero, Simon Templar, alias "The Saint". The title of the book is a pun on the religious organization Knights Templar. Later editions were titled The Avenging Saint and the book is also well known by this title, which was first used in a 1931 edition. Source: Wikipedia (en)