The Shadow Series by Walter B. Gibson, Maxwell Grant

WHO KNOWS WHAT EVIL LURKS IN THE HEARTS OF MEN?THE SHADOW KNOWS. But no one knows THE SHADOW. Cloaked in darkness and mystery, the man in black is a legend to those who have felt his remorseless hand: The Underworld. One step outside the law and many leagues ahead of the police in the battle against crime, he haunts the forbidding canyons of Manhattan with a mocking laugh that strikes terror into the souls of the guilty everywhere... moreWHO KNOWS WHAT EVIL LURKS IN THE HEARTS OF MEN?THE SHADOW KNOWS. But no one knows THE SHADOW. Cloaked in darkness and mystery, the man in black is a legend to those who have felt his remorseless hand: The Underworld. One step outside the law and many leagues ahead of the police in the battle against crime, he haunts the forbidding canyons of Manhattan with a mocking laugh that strikes terror into the souls of the guilty everywhere.With his invisible network of crimefighters who have pledged him their loyalty--and their lives, THE SHADOW stalks a trial of blood that begins with a strange Chinese coin and ends with a king's ransom in jewels. A fortune leading straight into the trap of a brilliant master criminal who has just pulled the job of a lifetime--in another man's skin! Has THE SHADOW met his match at last?(Originally published in The Shadow Magazine, Volume I, April/June 1931.) less

The lofty towers of the Kremlin loomed like spectral spires against the darkened sky. Senov - master spider in a web of espionage - was about to ensnare America in the mose nefarious deal of all time: behind the guise of a trade detante, he and his treacherous American trusties will swap the Romanoff jewels for help in restoring the ancient Russian monarchy!