The second volume of the investigations of a 19th century French police detective Monsieur Lecoq is one of the earliest fictional detectives and his success with the reading public undoubtedly influenced Sir Arthur Conan Doyle in the creation of his more renowned fictional detective, Sherlock Holmes. Lecoq, who was based on the actual former criminal turned police officer, Eugene Vidocq, was the creation of Emile Gaboriau (1832-73), a French author who had tried his hand at several genres before he became a pioneer of 'detective fiction'. 'The Lerouge Case' (1866) catapulted him to almost instantaneous fame. His reputation secured, more Lecoq stories followed and earned Gaboriau a substantial international readership, though this was diminished by the arrival of the Sherlock Holmes stories. Nevertheless, Gaboriau continued to write crime novels and enjoyed considerable success especially in France until his untimely death (aged just 40 years) from pulmonary apoplexy. In common with the life of the character upon whom he is based, Lecoq has a dark side to his personality which contrasts sharply with the usual unambiguously moral personalities of most of the great detectives in this genre. He has, however, the obligatory foil in the person of Taberet, an 'armchair detective' who acts as mentor to Lecoq and provides intellectual assistance to solve crimes without leaving his own bed. Unlike Holmes, Lecoq is not a private detective but an officer of the French Surete or La Surete Nationale which initially served as the detective branch of the Paris police force and was in fact created in 1812 by Vidocq who was its director until 1827. This Leonaur collection brings together all the Lecoq cases into one four volume edition for modern readers to enjoy. In volume two readers will discover, 'File No. 113' and 'A Disappearance', Leonaur editions are newly typeset and are not facsimiles; each title is available in softcover and hardback with dustjacket.