Doc Savage: The Men Who Smiled No More by Kenneth Robeson [1970 PAPERBACK]
VINTAGE PAPERBACK  BANTAM BOOKS
Nice vintage reading copy with some wear and a chipped corner to cover.
It started with a senseless murder. Then it spread -- all over New York men were becoming robot-like automatons without emotions. The Man of Bronze went into action. But even Doc Savage was stricken helpless before he solved the terrifying menace of The Death's Head Grin!