In this first full-length Ars ne Lupin novel the gentleman-thief remains a shadowy figure for most of the novel, working two steps beyond the law with a hidden aim. To fight against this anti-hero, Leblanc introduces Isidore Beautrelet, the prodigious school-boy detective. Also making an appearance are old foes Detective Ganimard and (in yet another copyright-defeating name change) Holmlock Shears. The battle of wills that ensues pulls Isidore through...