L'agence Barnett et Cie (Arsène Lupin #15)

Maurice Marie Émile Leblanc (11 November 1864 – 6 November 1941) was a French novelist and writer of short stories, known primarily as the creator of the fictional gentleman thief and detective Arsène Lupin, often described as a French counterpart to Arthur Conan Doyle's creation Sherlock Holmes.

Leblanc was largely considered little more than a writer of short stories for various French periodicals when the first Arsène Lupin story appeared in a series of short stories serialized in the magazine Je Sais Tout, starting in No. 6, dated 15 July 1905. Clearly created at editorial request under the influence of, and in reaction to, the wildly successful Sherlock Holmes stories, the roguish and glamorous Lupin was a surprise success and Leblanc's fame and fortune beckoned. In total, Leblanc went on to write twenty-one Lupin novels or collections of short stories.

By 1907 Leblanc had graduated to writing full-length Lupin novels, and the reviews and sales were so good that Leblanc effectively dedicated the rest of his career to working on the Lupin stories. Like Conan Doyle, who often appeared embarrassed or hindered by the success of Sherlock Holmes and seemed to regard his success in the field of crime fiction as a detraction from his more "respectable" literary ambitions, Leblanc also appeared to have resented Lupin's success. Several times, he tried to create other characters, such as private eye Jim Barnett, but eventually merged them with Lupin. He continued to pen Lupin tales well into the 1930s.

Leblanc also wrote two notable science fiction novels: Les Trois Yeux (1919), in which a scientist makes televisual contact with three-eyed Venusians, and Le Formidable Evènement (1920), in which an earthquake creates a new landmass between England and France.

Marie Émile Maurice Leblanc est un écrivain français né à Rouen, et mort à Perpignan. Auteur de nombreux romans policiers et d’aventures, il est le créateur du célèbre personnage d’Arsène Lupin, le gentleman-cambrioleur.