With L'aiguille creuse, Maurice Leblanc finally gives Arsène Lupin an adversary worthy of him. And yet, with his rosy, girlish face and his crew-cut hair, Isidore Beautrelet is only a high school student, about to sit for his baccalaureate exams. Will he be able to explain the strange crime committed at the Château d’Ambrumésy? To understand the ties that bind the gentleman thief to the beautiful Mlle de Saint-Véran? To decipher the secret of the Hollow Needle, a secret whose key was known only to the kings of France? Published in 1909, L'aiguille creuse remains the most famous adventure of Arsène Lupin.