When one of Arséne Lupin' victims is found dead in a way that implicates the wily criminal, he insists on heading the police search for the real murderer. The mystery involves finding a package of letters once written to Bismarck, locating a clock on which the number 813 has significance, as well as causing a reigning emperor to make several journeys incognito. Murders by the dozens, suicide and mild forms of torture are warp and woof of the plot. (Goodreads)
Maurice Marie Émile Leblanc; 11 December 1864[2] – 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.