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Includes "The Ether Robots" by Frank Belknap Long
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Features "The Book of Death" by Maxwell Grant.
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"Death Is My Destiny" by Robert J. Hogan.
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Cover by Earle K. Bergey. Includes "A Yank At Valhalla" by Edmond Hamilton.
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Cover by John Howitt. Includes "Drums Of Destruction" by Curtis Steele.
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Includes "Black Fire" by Walt Coburn.
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Cover by Hannes Bok. Includes "The Robot God" by Ray Cummings.
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Includes Williamson, Wellman.
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Cover by Virgil Finlay. Includes "The Creeper In The Crypt" by Robert Bloch.
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"Cargo Unknown" by Kenneth Robeson.
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Cover by Rogers. Includes "Magic City" by Nelson S. Bond.
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Includes "The Shadow Battles Q".
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Includes "The Museum Murders" by Maxwell Grant.
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Includes "Captain Future and the Seven Space-Stones" by Edmond Hamilton.
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Cover by Rogers. Includes "There Shall Be Darkness" by C. L. Moore.
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Only issue. Cover by Joseph Chenoweth. Includes "Gods Guard The Brave" by H. Bedford Jones.
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Cover by Walter Popp. Includes "The Time Masters" by Wilson Tucker.
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Includes "The Deadly Dust" by William Fitzgerald.
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Cover by A. R. Tilburne. Includes "The Valley Of The Assassins" by Edmond Hamilton.
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"White Wings for the Dead" by Robert J. Hogan.
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"The Sky Serpent Flies Again" by Robert J. Hogan.
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Includes "The Seven Sleepers" by Henry Kuttner & A.. Barnes.
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Includes "Gunsmoke For Sale" by Laurence Donovan.
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Cover by E. Franklin Wittmack. Includes "Under Your Spell" by Henry Kuttner.
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Includes "The Mathematics Of Magic" by L. Sprague de Camp & Fletcher Pratt.
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Includes "Gunswift" by Jack Byrne.
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Cover by Earle K. Bergey. Includes "The Dark World" by Henry Kuttner.
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Includes "The Quest Beyond The Stars" by Edmond Hamilton.
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Includes "The Jumper" by Theodore Sturgeon.
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Includes "We Bomb Tokyo!" by Jay Hamilton.
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"The Falcon Flies with the Damned" by Robert J. Hogan.
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Cover by J. Allen St. John. Includes "Bucaneers Of Venus (Part 1)" by Otis Adelbert Kline.
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Cover by Earle K. Bergey. Includes "Other Eyes Watching" by Polton Cross.
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Cover by Earle Bergey. Includes "The Lake Of The Gone Forever" by Leigh Brackett.
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Includes "Fugitives Two" by Robert Carse.
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Includes "Dodging Clouds In Mexico" by Major Bernard A. Law.
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Cover by John Howitt. Includes "King Of The Red Killers" by Grant Stockbridge.
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Includes "Five Aces West" by Cliff Farrell.
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Cover by John Howitt. Includes "Invasion of The Yellow Warlords" by Curtis Steele.
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"The Mark of the Vultures" by Robert J. Hogan.
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Cover by John Howitt. Includes "Patriot's Death Battalion" by Curtis Steele.
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Cover by Bill Wayne. Includes "The Shadow From The Steeple" by Robert Bloch.
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Includes "Dawn Of Flame" by Stanley G. Weinbaum.
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"Wings of the Gray Phantom" by Robert J. Hogan.
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"Squadron of the Flying Death" by Robert J. Hogan.
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Cover by Margaret Brundage. Includes "The Metronome" by August W. Derleth.
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Cover by F. Tinsley. Includes "Germany Flies Again" by Arch Whitehouse.
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Cover by Margaret Brundage. Includes "A Wig For Miss Devore" by August Derleth.
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Cover by Rogers. Includes "The Professor Was A Thief" by L. Ron Hubbard.
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Includes "The Bloody Frontiers" by Curtis Steele.
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Includes "The Gold Ogre" by Kenneth Robeson
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Formerly Detective Mystery.
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Cover by John Newton Howett. Includes "Things That Once Were Men" by Wyatt Blassingame.
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Cover by Matt Fox. Includes "The Cheaters" by Robert Bloch.
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Cover by Alex Schomburg. Includes "The Hellflower" by George O. Smith.
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"The Devil's Sky Trap" by Robert J. Hogan.
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"Hordes of the Wingless Death" by Robert J. Hogan.
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Includes "Ace Of Destiny" by Ralph Oppenheim.
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Two alternate covers are known to exist.
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Cover by E. Franklin Wittmack. Includes "Yours Truly...Jack The Ripper" by Robert Bloch.
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Cover by John Howitt. Includes "America's Plague Battalions" by Curtis Steele.
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Includes "Heredity" by Isaac Asimov.
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Cover by John Howitt. Includes "The Invisible Empire" by Curtis Steele.
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Cover by Lee Brown Coye. Includes "Notebook Found In A Deserted House" by Robert Bloch.
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Cover by Rogers. Includes "Salvage" by Vic Phillips
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Includes "The Pure Evil" by Kenneth Robeson.
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Cover by George Rozen. Includes "The Sky Hawk Screams" by Arthur Guy Empy.
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Includes "The Room" by L. Ron Hubbard.
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Cover by Margaret Brundage. Includes "Psychopompos" by H. P. Lovecraft.
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Final issue. "The Mystery of the Singing Mummies" by Donald E. Keyhoe.
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Cover by Rogers. Includes "Old Man Mulligan" by P. Schuyler Miller.
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Cover by Cartier. Includes "Lest Darkness Fall" by L. Sprague de Camp.
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Includes "The Space Beasts" by Clifford D. Simak.
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"Squadron of the Damned" by Robert J. Hogan.
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"Death Rides the Midnight Patrol" by Robert J. Hogan.
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Includes "The Day To Come" by Don Tracy.
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Cover by Rogers. Includes "Logic Of Empire" by Robert Heinlein.
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Cover by Walter Popp. Includes "Centaurus" by Sam Merwin, Jr.
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Cover by Earle K. Bergey. Includes "The Kid From Mars" by Oscar J. Friend.
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Cover by John Howitt. Includes "Slaves Of The Crime Master" by Grant Stockbridge.
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Cover by Jerome Rozen. Includes "The Masked Invasion" by Curtis Steele.
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Includes "The Sky Ring" by Maxwell Grant.
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Cover by Anderson. Includes "The Star Kings" by Edmond Hamilton.
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Final issue. Cover by Earle K. Bergey. Includes "Days Of Creation" by Brett Sterling.
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