Death in Silver — Kenneth Robeson

A crime wave of monstrous proportions leaves New York stunned. Mysterious men garbed in silver have made off with millions in plunder, murdering all witnesses and offerring no clue of their hideous origins.
The city turns to The Man Of Bronze and his awsome crew to halt the evil - but first Doc must save his own cousin as she lies trapped in the gang's lair, marked for certain death!