Maurice Leblanc 
Crystal Stopper 

The Crystal Stopper is a mystery novel by Maurice Leblanc featuring the adventures of the gentleman thief Arsene Lupin. During a burglary at the home of Deputy Daubrecq a crime is committed and two accomplices of Arsene Lupin are arrested by the police. One is guilty of the crime, the other innocent but both will be sentenced to death. Lupin seeks to deliver the victim of a miscarriage of justice, but struggles against Deputy Daubrecq’s ruthless blackmailer, who has an incriminating document hidden in a crystal stopper.