Secret Agent "X": The Sinister Scourge: in Bloomington, MN

A FICTION HOUSE PRESS REPRINT:
Flaming phosphorous frustrated and imperiled the supersleuth, Secret Agent X, wherever he turned in his search for the dire criminal mastermind whose gigantic narcotic ring threatened to enslave the nation. All X's genius at disguise and subterfuge seemed impotent against the baffling plot of The Sinister Scourge.