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Only issue. Cover by Brundage. Includes "The Master Of Dragons" by H. Bedford Jones.
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Includes "Captain Future And The Seven Space Stones" by Edmond Hamilton.
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Includes "Purple Aces" by Robert J. Hogan.
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Cover by Emsh. Includes "Cholwell's Chickens" by Jack Vance.
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Cover by Walter Popp. Includes "The Star Dice" by Roger Dee.
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Includes "Tomb for the Living" by Justin Case.
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Cover by Graves Gladney. Features "Black Destroyer" by A. E. van Vogt and includes "Trends" by Isaac Asimov.
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Cover by John Howitt. Includes "Satan's Death Blast" by Grant Stockbridge.
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Includes "The Spider And The Raceless One" by Grant Stockbridge.
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Includes "A God In A Garden" by Theodore Sturgeon.
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Includes "Gunswift" by Jack Byrne.
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Cover by John Giunta. Includes "The Perfect Host" by Theodore Sturgeon.
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Cover by John Howitt. Includes "Emperor Of The Yelloe Death" by Grant Stockbridge.
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Includes "Captain Future and the Seven Space-Stones" by Edmond Hamilton.
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Includes "The Living Equation" by Nat Schachner.
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Cover by Cartier. Includes "Lest Darkness Fall" by L. Sprague de Camp.
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Includes "The Quest Of Tarzan" by Edgar Rice Burroughs.
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Includes "The Shadow Battles Q".
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Cover by Alex Schomburg. Includes "The Houses Of Iszm" by Jack Vance.
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Cover by Rogers. Includes "Final Blackout" Part 2 by L. Ron Hubbard.
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Includes "The Magician Of Mars" by Edmond Hamilton.
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Includes "The Three Planeteers" by Edmond Hamilton.
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Small digest size format.
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Cover by John Howitt. Includes "The Bloody Forty-Five Days" by Curtis Steele.
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Cover by Earle K. Bergey. Includes "Hollywood On The Moon" by Henry Kuttner.
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Includes "The Crime Laboratory" by Grant Stockbridge.
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Features "The Rustling Death" by Kenneth Robeson.
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Includes "The Black Flame" by Stanley G. Weinbaum
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Includes "Sands Of Sahara" by Robert Carse.
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Cover by Margaret Brundage. Includes "The Brood Of Bubastis" by Robert Bloch.
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Includes "Swooning Lady" by Kenneth Robeson.
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Cover by Belarski. Includes "Watered Guns" by Walt Coburn.
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Includes "Land Of The Burning Sea" by Malcolm Jameson.
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Includes "The Haunt" by Theodore Sturgeon.
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Cover by A. R. Tilburne. Includes "Bang! You're Dead" by Ray Bradbury.
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Includes "The Great Airways" by Capt. Samuel Taylor Moore.
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Includes "Journey To Barkut" by Murray Leinster.
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Includes "Spank Magic" by Reggie Coghlan.
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Cover by Graves Gladney. Includes "The Ultimate Adventure" by L. Ron Hubbard.
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Includes "The Day Of The Conquerors" by Manly Wade Wellman.
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Cover by Boris Dolgov. Includes "Quest Of The Gazolba" by Clark Ashton Smith.
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Cover by Matt Fox. Includes "The Night" by Ray Bradbury.
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Cover by Matt Fox. Includes "The Underbody" by Allison V. Harding.
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"The Sky Serpent Flies Again" by Robert J. Hogan.
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Continuing from Strange Detective Mysteries.
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Includes "Your Money's Worth In The Air" by Lieut. W. M. Wood.
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Cover by John Giunta. Includes "The Trail Of Cthulhu" by August Derleth.
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Two alternate covers are known to exist.
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Includes "The Gods Hate Kansas" by Joseph J. Millard.
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Includes "The Green-Eyed Monster" by Theodore Sturgeon.
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Includes "Three Guns For Tonto" by W. C. Tuttle.
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"The Terror in the Navy" by Kenneth Robeson.
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Cover by John Hewitt. Includes "The Red Invader" by Curtis Steele.
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Includes "Blow Cold, Blow Hot" by Frederick C. Davis.
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Cover by Earle Bergey. Includes "The Seed From Space" by Fletcher Pratt.
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Cover by Charles L. Wrenn. Includes "Mate For A Monster" by Hugh B. Cave.
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Features "The Devil's Black Rock" by Kenneth Robeson.
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Includes "Invaders From The Outer Suns" by Frank Belknap Long, Jr.
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Includes "Son Of Two Worlds" by Edmond Hamilton.
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Cover by J. Allen St. John. Includes "Buccaneers Of Venus (Part 3)" by Otis Adelbert Kline.
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"The King of Terror" by Kenneth Robeson.
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Cover by Earle Bergey. Includes "Lord Of The Storm" by Keith Hammond.
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Includes "Make Mine Light" by Arch Whitehouse.
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Includes "Death In A Cockpit" by Arthur J. Burks.
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Includes "The Dark Tower" by Wallace West.
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Cover by Ed Emsh. Includes "Too Late For Eternity" by Bryce Walton.
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"The Bloody Wings of the Vampire" by Robert J. Hogan.
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Includes "Beating The Weather Devils" by Lieut. W. M. Wood.
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Cover by H. W. Scott. Includes "Slaves Of Sleep" by L. Ron Hubbard.
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Features "The Time Terror" by Kenneth Robeson.
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Cover by John Howitt. Includes "March Of The Flame Marauders" by Curtis Steele.
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Cover by Margaret Brundage. Includes "Wild Grapes" by A. W. Derleth.
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"Sky-Guns for the Murder Master" by Robert J. Hogan.
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Cover by Rudolph Belarski. Includes "The Water World" by Oscar J. Friend.
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Includes "Fear" by L. Ron Hubbard. First publication of this novel.
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Cover by Belarski. Includes "All Survivors Report" by Georges Surdez.
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Cover by John Howitt. Includes "Death Reign Of The Vampire King" by Grant Stockbridge.
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Includes "The Fortress Of Utopia" by Jack Williamson
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Includes a 16-page color comics section.
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Includes "The Deadly Dust" by William Fitzgerald.
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Cover by John Howitt. Includes "Dragon Lord Of The Underworld" by Grant Stockbridge.
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Cover by John Howitt. Includes "Wings Of The Black Death" by Grant Stockbridge.
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Cover design by C.C. Senf. Includes "The White Ship" by H.P. Lovecraft.
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"The Condor Rides With Death" by Robert J. Hogan.
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Includes "No Greater Love" by Henry Kuttner.
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Cover by H. V. Brown. Includes "Giants From Eternity" by Manly Wade Wellman.
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Cover by A. R. Tilburne. Includes "Satan's Phonograph" by Robert Bloch.
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