Tenebras -- a phantom-like criminal who defies all the police of Europe. Against him are arrayed the forces of Harry Dickson, the American Sherlock Holmes, and the dynamic Inspector Loustaud of the French SUretE, but also the Simpson Brothers, two ruthless American billionaires who will do anything in their power, and commit any crime, to seize the $1.5 million inheritance of young Teddy, the son of the beautiful Comtesse Dianah de Villerville.

This prodigious criminal saga, penned by Arnould Galopin, the creator of Doctor Omega, was first published in France...