Le Bouchon de Cristal" is a novel by the French writer Maurice Leblanc. This work is a part of Leblanc's series featuring the famous fictional character Arsène Lupin, a gentleman thief and master of disguise.

In this novel, Arsène Lupin embarks on a new adventure, characterized by his wit, cunning, and audacious heists. "Le Bouchon de Cristal" refers to a valuable crystal stopper, which becomes a central object of intrigue in the story.

Maurice Leblanc's Arsène Lupin series is known for its blend of mystery, humor, and adventure. Arsène Lupin is a charismatic antihero who often finds himself in precarious situations but uses his intellect and charm to outsmart his adversaries.