Ripped from the pages of the October, 1937 issue of Secret Agent X magazine comes this sensational full length novel, The Assassins' League!

When a wealthy arms manufacturer and a powerful gang lord both kill themselves -- when each had the world by the tail -- Secret Agent X looks into the suicides. What is the baffling, contradictory cause of their enigmatic deaths?

Worse yet, throughout the course of his investigation, X's amazing disguises fail him at every turn. A strange, beautiful girl possesses the power to see through his perfect impersonations.

Has the man of a thousand faces finally met his match?

With boiling lead that stilled men's tongues, and bombs that mangled human bodies, the hooded hordes threatened America. Their power was spreading from State to State like a hideous blight. Their spies seemed everywhere - and against this dread secret society went the Man of a Thousand Faces, into a danger that even he did not forsee!

Ripped from the pages of the March 1936 issue of Secret Agent "X" magazine, here is "The Fear Merchants," a thrilling pulp novel! Includes the great original magazine art.

Flame demons swept across the city. And in their scorching wake came a new horror. The firemen fighting the vast inferno suddenly toppled from their ladders, their shrieks piercing the blazing roar. For when the firefighters struck the pavement they were distorted, bloated husks. . . .

Secret Agent "X" was at that fire. But his manhunt was blocked by a barrier of the bloated dead.

"The Torture Trust" they called themselves -- that unholy trio who met in a hidden room in a deserted part of the city. Brilliant men by day, leading scholarly and productive lives as far as the police and the outside world were concerned, secretly they donned black cloaks and ran an organization of evil . . . for "The Torture Trust" threatened their blackmail victims with a terrible acid bath, leaving a trail of faceless corpses to bear mute testimony to their power! Fearless, alone, Secret Agent X went against them in a desperate battle of wits at the gateway to destruction!

The identity of Secret Agent "X" is an enigma. He comes and goes veiled in a cloak of mystery. His name, his background, and even his date of birth are riddles, even to those who know him best. He is a man of a thousand faces -- master of make-up, voice impersonation, and acting. With the dogs of war snarling at the door of the United States, Secret Agent "X" goes where other investigators dare not follow . . . to the cesspits of Hawaii, where spies and plots abound, where a secret Hindu cult does the bidding of a foreign government bent on plunging the U.S.A. into the midst of a new global war! This thrilling Secret Agent "X" novel, among the best in the series, will delight all fans of classic pulp fiction! This edition features an additional story, "Latin Blood," by Robert Leslie Bellem, which features Dan Turner, Hollywood Detective.

From the pages of the September, 1935 issue of Secret Agent X comes this sensational full length novel, Legions of the Living Dead: "From nowhere hurtled that black death car. And from nowhere came its grisly occupants. They were not of the earth, for their human flesh was immune to bullets. They were not of the grave, for they manned the wheel and a blasting machine gun- Secret Agent "X" made a desperate maneuver to block their invasion of the land of the living. And in that weird terror trap, he came face to face with a man he knew-a man he knew had died five years ago!"