"The Hollow Needle; Further adventures of Arsène Lupin" by Maurice Leblanc is a novel serialized between November 1908 and May 1909. The gentleman thief Arsène Lupin faces his most formidable opponent yet: Isidore Beautrelet, a gifted high school student turned amateur detective. At stake is an ancient secret passed down by French kings since Julius Caesar—the location of a legendary treasure containing queens' dowries and priceless jewels. Can the young detective outsmart the master thief and uncover the mystery of the Hollow Needle? (This is an automatically generated summary.)