The Crystal Stopper. A Missing Bottle, a List of Names, and the One Secret Lupin Can't Afford to Lose

A small crystal stopper, easy to overlook, holds a secret that could destroy Arsène Lupin - a list of names tied to a political scandal, hidden by one of his own men gone rogue. To save himself, and a friend sentenced to the guillotine for a crime he didn't commit, Lupin has to out-maneuver the police, a blackmailer, and the clock itself. One of the darkest, tensest entries in the series - less caper, more countdown, with genuinely high stakes for a hero who usually treats danger as a game.