Cover by Earle K. Bergey. Includes "What Mad Universe" by Fredric Brown (first published appearance of this novel).
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Includes "King Of Fang And Claw" by Bob Byrd. First appearance of a Tarzan-like character named Ka-Zar. Cover painting by J. W. Scott.
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Includes "Mad Mesa" by Kenneth Robeson.
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Includes "Yellow Man Of Evil".
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"Here Flies the Hawk of Hell" by Robert J. Hogan.
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Final issue. Includes "Emeralds Of The Inca" by George Creel.
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Includes "Hang Him High" by Norbert Davis.
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Cover by Graves Gladney. Includes "The Ghoul" by L. Ron Hubbard.
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Cover by A. R. Tilburne. Includes "Bang! You're Dead" by Ray Bradbury.
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Cover by Jack Coggins. Includes "The Amateur Alchemist" by Murray Leinster.
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Cover by F. Tinsley. Includes "The White Pygmy" by George L. Eaton.
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"Wings of the Doomed" by Robert J. Hogan.
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Final issue as Captain Satan; continues as Strange Detective Mysteries.
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Cover by Jack Coggins. Includes "Booby Prize" by George O. Smith.
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Includes "The Hornet Stings" by Samuel Merwin.
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Cover by John Howitt. Includes "Rockets From Hell" by Curtis Steele.
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Cover by Matt Fox. Includes "The Testament Of Clairborne Boyd" by August Derleth.
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Cover by Virgil Finlay. Includes "The Creeper In The Crypt" by Robert Bloch.
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Features "The Magic Forest" by Kenneth Robeson.
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"Flying Coffins of the Damned" by Robert J. Hogan.
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Includes "The Time Machine" by H. G. Wells. Cover by Anderson.
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"The Mark of the Vultures" by Robert J. Hogan.
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Cover by Rogers. Includes "Sixth Column" by Anson MacDonald.
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"Wings of the Gray Phantom" by Robert J. Hogan.
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Cover by John Howitt. Includes "The Wheel Of Death" by R. T. M. Scott.
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Cover by John Howitt. Includes "The League Of War Monsters" by Curtis Steele.
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Cover by Boris Dolgov. Includes "Quest Of The Gazolba" by Clark Ashton Smith.
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Cover by Boris Dolgov. Includes "Lizzie Borden Took An Axe" by Robert Bloch.
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Includes "The Day Of The Damned" by Curtis Steele.
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Cover by W. H. Silvey. Includes "The House In The Valley" by August Derleth.
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Includes "Bomers Above" by Lieut. W. M. Wood.
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Cover by Anderson. Includes "The Star Kings" by Edmond Hamilton.
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Includes "Dictator's Death-Merchants" by Grant Stockbridge.
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Includes "Fugitives Two" by Robert Carse.
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Includes "Jeopardy's Jewel" by H. Bedford-Jones.
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Cover by John Howitt. Includes "The Pain Emperor" by Grant Stockbridge.
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Cover by F. Tinsley. Includes "Soaring And Gliding" by John Du Barry.
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"Squadron of the Flying Death" by Robert J. Hogan.
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Cover by John Howitt. Includes "Wings Of The Black Death" by Grant Stockbridge.
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Includes "The Voice Of The Lobster" by Henry Kuttner.
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Cover by F. Tinsley. Includes "Germany Flies Again" by Arch Whitehouse.
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Includes "The Day Of The Conquerors" by Manly Wade Wellman.
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Includes "Shoot First-Our Navy Is Ready!" by Corey Beckwith.
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Includes "Border Patrol" by Lieut. P. S. Lyons.
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Includes "Hang Him High" by Norbert Davis.
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Includes "The Perilous Pearl" by H. Bedford-Jones.
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Cover by John Howitt. Includes "Dragon Lord Of The Underworld" by Grant Stockbridge.
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Cover by Ray Quigley. Includes "Seven Seconds Of Eternity" by Robert H. Leitfred.
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Includes "The Crimson Line" by George L. Eaton.
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Includes "Beating The Weather Devils" by Lieut. W. M. Wood.
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Cover by John Newton Howett. Includes "Brides For The Dead" by Hugh B. Cave.
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Cover by Walter Popp. Includes "Naked Eye" by Thomas Bell.
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Cover by Walter Baumhofer. Includes "The Spider Strikes" by R. T. M. Scott.
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Features "Dead Man's Chest" by Maxwell Grant.
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Final issue thus. Continuing as STREET & SMITH'S AIR TRAILS.
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"The Black Wings of the Raven" by Robert J. Hogan.
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"The Spook Legion" by Kenneth Robeson.
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Cover by Margaret Brundage. Includes "The Six Sleepers" by Edmond Hamilton.
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Cover by H. W. Brown. Includes "Mercutian Adventure" by Raymond Z. Gallun.
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Features "Suicide Trail" by Clifford Goodrich.
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Formerly Thrilling Mystery.
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Final issue thus; continuing as THE MAGIC CARPET.
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Includes "A Witch Shall Be Born" by Robert E. Howard.
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Includes "Island In The Sky" by Manly Wade Wellman.
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Includes "The Suicide Battalion" by Curtis Steele.
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Includes "Cavern Of The Shining Pool" by Arthur Leo Zagat.
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Includes "Chains Of The Living Dead" by Arthur Leo Zagat.
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