Claude Izner is the pen-name of two sisters, Liliane Korb and Laurence Lefevre. Both are booksellers on the banks of the Seine, and they are experts on nineteenth-century Paris. "The Montmartre Investigation" is their second book and was first published in 2003 as "Le Carrefour des Ecrases" in France. It sees a return for Victor Legris, the hero of their previous two books - "Murder on the Eiffel Tower" and "The Père Lachaise Mystery".
About a year has passed since "The Père Lachaise Mystery", and Victor still runs his bookshop in Paris' sixth arrondissement. Victor and his business partner, Kenji Mori, are very close - Victor's father died when he was eight, and he was pretty much raised by Kenji. Victor has suspected for a couple of years that Kenji has a secret lover in London - however, the older man has said nothing, and Victor has chosen not to pry. The secret lady in Kenji's life makes her first appearance at the start of "The Montmartre Investigation" : however, Iris is not Kenji#s lover. (In fact, she's introduced as Kenji's god-daughter). She has now enrolled in a boarding school in Paris, so Kenji will be able to visit a little more often. However, sooner or later, Victor is going to discover Kenji's secret...
One of Iris' classmates, Elisa, has managed to catch the eye of a young gentlemen called Gaston. She meets him for the first time, at the book's beginning, and is desperately smitten. However, Gaston is not quite the gallant young knight she believes : he considers her a "romantic young ninny" and only hopes to trap her for his employer. Within a few months, she's dead : drugged by Gaston, she's then killed by his boss and dumped at the Killer's Crossing in Montmartre. Since her face has been disfigured with acid, she isn't going to be easily identified. However, the story appears in the newspaper - and it's exactly the sort of ting that ppeals to Joseph, who works for Victor and Kenji. Victor would have had no inclination to investigate the murder only for an old goatherd called Gregoire - whose dog had found one of the shoes being worn by Elisa. The bookshop's name and address appeared on an inner sole - so the goatherd decided to "return" it to the bookshop. Victor correctly believes the shoe belongs to Kenji's lady friend, and decides to do a little snooping. He's right : Elisa had borrowed the shoes from Iris for her final date with Gaston. (The treacherous young Romeo was also dispatched by his boss - though it's a little while before his body is discovered). Before long, Victor's fairly innocent snooping sees him unofficially investigating another string of murders across Paris...
An easy and enjoyable read, and a book that seems to give a historically 'accurate' description of Paris at the time. (There are a few notes at the end of the book, covering late 19th Century Parisian nightlife and a couple of footnotes of people and events mentioned in the book). Having said that, it never gets too academic or bogged down in detail. Good fun, certainly recommended.