A shot in the night at a Norman country-house, a wounded burglar who vanishes, and stolen pictures that may not have been stolen at all: the police are baffled, but Isidore Beautrelet, a sixth-form schoolboy, is not. His duel with Arsène Lupin leads to a cryptogram and an old secret passed down from Caesar to the kings of France.
Perhaps the most celebrated of the Lupin novels, a puzzle-adventure that mixes detection with French history. Download the free EPUB.