In 1920s' Paris, the French king of detectives takes on a new batch of baffling cases in a series of traditional crime adventure thrillers.

Murder!

When the Count de Roscanvel's body is found on the railway tracks, shot through the heart then hit by the Blue Train from Paris to Marseille, police accuse France's top young novelist and the count's beautiful wife is suspected of complicity.

Harassed by the police and shunned by her family, there's only one place Countess de Roscanvel can turn to: a small house in Paris on Avenue de Verzy, home to...

Chantecoq, king of detectives, master of disguise.

With the help of his wily secretary Météor, intrepid daughter Colette, and star reporter son-in-law Jacques Bellegarde, Chantecoq finds himself caught in a race against time to save an innocent man and to restore the countess' honour.

As an enigmatic former client returns to haunt France's greatest detective and a masked man stalks the Countess de Roscanvel, can Chantecoq solve the Mystery of the Blue Train?

First published in France in 1929 (as Le Mystère du Train Bleu), and never before translated into English, this book is part of the Further Exploits of Chantecoq series, which sees the secret agent and expert spy catcher of Chantecoq and the Aubry Affair reborn as the greatest private detective of his age.