The Four False Weapons - John Dickson Carr (as Carter Dickson)

Famed French detective Monsieur Bencolin comes out of retirement to solve a crime of passion in Golden Age mystery master John Dickson Carr's sophisticated and surprising novel

London lawyer Richard Curtis is sent to Paris by one of the firm's senior partners to handle a delicate case. Revelations about playboy Ralph Douglas's former mistress, the stunning redhead Rose Klonec, threaten Douglas's impending marriage. But upon Curtis's arrival in Paris, a body is discovered alongside not one but four different murder weapons. To save his client from the gallows, Curtis turns to the brilliant Monsieur Bencolin. Only this suave, devilish detective is ideally suited to unravel a case this strange with so many contradictory clues and passionately motivated suspects.

The Four False Weapons is the 5th book in the Monsieur Bencolin Mysteries, but you may enjoy reading the series in any order.