We present to our readers a collection of three of the best works by Claude Isner, whose historical detective stories have become world bestsellers. Victor Legris, a bookstore owner and amateur detective, unravels the most ingenious and dangerous crimes committed in Paris at the end of the 19th century. The refined atmosphere of the time and precise historical details - the construction of the Eiffel Tower, gas lighting, women's struggle for equality - give Claude Isner's detective stories a special charm that readers value so much.