Attic > Audio Book: Operator 5: The Invisible Empire
by Curtis Steele

Unseen, impregnable, the strange war engine of a foreign power hovered over America, waiting the fatal moment to hurl death upon a thousand cities and towns. Foredoomed to destruction and desolation before the ravaging hordes of the Yellow Empire, bleak despair gripped the nation's millions.
And then men held their breath in agonizing hope - as Operator #5, single-handed, seized the last grim chance to save the United States!
Adapted from the May 1934 story, appearing in Operator 5 magazine. Also included are two short stories by Robert C. Blackmon and Arthur Leo Zagat.
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Format: Audio Compact Disc
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- Available in Audio Compact Disc
- Audio Book: Operator 5: TheYellow Scourge
- Available in Chapbook
- Liberty's Suicide Legions
- Available in Electronic PDF File
- Attack of the Blizzard Men
- Blood Reign of the Dictators
- Cavern of the Damned
- Invasion of the Dark Legions
- League of War Monsters
- Master of Broken Men
- Operator 5: Legions of Starvation
- Operator 5: Legions of the Death Master
- Operator 5: Raiders of the Red Death
- Operator 5: The Masked Invasion
- Operator 5: The Suicide Battalion
- Operator 5: The Yellow Scourge
- Revolt of the Devil Men
- The Green Death Mists
- The Invisible Empire
- The Melting Death
- The Red Invaders
- War Masters of the Orient
- Available in Paperback
- Blood Reign of the Dictator
- Operator 5: Invasion of the Crimson Death Cult: Reprint
- Operator 5: Invasion of the Dark Legions
- Operator 5: Libertys Suicide Legions
- Operator 5: The Army of the Dead: Reprint
- Operator 5: Winged Hordes of the Yellow Vulture
- Revolt of the Devil Men
- Available in Pulp Replica
- Replica: Operator 5: Army of the Dead ( March 1935 )
- Replica: Operator 5: Invasion of the Crimson Death Cult: Sept. 1935
- Replica: Operator 5: League of War Monsters (Feb. 1935)
- Replica: Operator 5: The Dawn that Shook the World Nov-Dec 1938
- Replica: Operator 5: The Day of the Damned Sept - Oct 1938
- Replica: Operator 5: The Red Invaders (Jan. 1935)
- Replica: Operator 5: The Suicide Battalion July - Aug 1938
- Replica: Operator 5: War Masters From The Orient March 1936
- Replica: Operator 5: When Hell Came to America Jan - Feb 1939
- Replica: Operator 5:Invasion From the Sky Mar - Apr 1939