Cover by Margaret Brundage. Includes "The Graveyard Rats" by Henry Kuttner.

Includes "Swooning Lady" by Kenneth Robeson.

Includes "And So To Death" by Cornell Woolrich.

"The Green Scourge of the Sky Raiders" by Robert J. Hogan.

Cover by Earle Bergey. Includes "The Blue Flamingo" by Hannes Bok.

Features "Blood Donor Boomerang" by Frederick C. Davis.

"Squadron of the Flying Death" by Robert J. Hogan.

Cover by Margaret Brundage. Includes "Come To Me!" by August W. Derleth.

Cover art by Emery Clarke. Includes "The Evil Gnome" by Kenneth Robeson.

"Five Fathoms Dead" by Kenneth Robeson.

Includes "Solomon's Stone" by L. Sprague de Camp.

The early issues were published in the format of Macfadden's "true story" magazines. To add versimilitude, the magazine was illustrated with double-exposure photographs and the stories often carried double bylines in the form "by X as told to Y," where X

Includes "Hang Him High" by Norbert Davis.

Includes Williamson, Simak.

Includes "The Day To Come" by Don Tracy.

Includes "The Dual World" by Arthur K. Barnes.

Cover by John Howitt. Includes "Invasion of The Yellow Warlords" by Curtis Steele.

Cover by Rogers. Includes "There Shall Be Darkness" by C. L. Moore.

Cover by Ed Emsh. Includes "Too Late For Eternity" by Bryce Walton.

Cover by F. Tinsley. Includes "The Man Who Fell From The Skies'" by George L. Eaton.

Cover by Margaret Brundage. Includes "The Man Who Was Two Men" by A. W. Bernal.

Includes "The Humanoids" by Jack Williamson. Cover by Anderson.

Includes "The Quest Of Tarzan" by Edgar Rice Burroughs.

Cover by Harold S. DeLay. Includes "In The Walls Of Eryx" by Kenneth Sterling & H. P. Lovecraft.

Features "The Terrible Stork" by Kenneth Robeson.

Cover by John Howitt. Includes "Rockets From Hell" by Curtis Steele.

Final issue.

"Wings of the Death Monster" by Robert J. Hogan.

Cover by John Howitt. Includes "King Of The Red Killers" by Grant Stockbridge.

Includes "Laboratory Of The Damned" by Grant Stockbridge.

Cover by Margaret Brundage. Includes "Wine Of The Sabbat" by Robert Bloch.

Includes "The Lost World Of Time" by Edmond Hamilton.

Includes "Three Guns For Tonto" by W. C. Tuttle.

Includes "Bomers Above" by Lieut. W. M. Wood.

Includes "Power For Zenovia" by Willard E. Hawkins.

Includes "The Day Of The Conquerors" by Manly Wade Wellman.

Includes "Sands Of Sahara" by Robert Carse.

Includes "The Book Of Ptath" by A. E. van Vogt.

Cover by John Newton Howett. Includes "Brides For The Dead" by Hugh B. Cave.

Includes "Island In The Sky" by Manly Wade Wellman.

Includes "Mad Mesa" by Kenneth Robeson.

Cover by Rogers. Includes "Nightfall" by Isaac Asimov.

"Hordes of the Wingless Death" by Robert J. Hogan.

Cover by John Howitt. Includes "The Bloody Forty-Five Days" by Curtis Steele.

Cover by H. W. Brown. Includes "The Tramp" Part 2 by L. Ron. Hubbard.

"The Land of Terror" by Kenneth Robeson.

Includes "Your Money's Worth In The Air" by Lieut. W. M. Wood.

Includes "To Heaven Standing Up" by Paul Ernst.

Cover by Earle Bergey. Includes "Lands Of The Earthquake" by Henry Kuttner.

Final issue. Cover by Emsh. Includes "Gateway To Paradise" by Jack Williamson.

Cover by John Howitt. Includes "Slaves Of The Murder Syndicate" by Grant Stockbridge.

Only issue. Cover by Brundage. Includes "The Master Of Dragons" by H. Bedford Jones.

Cover by H. W. Brown. Features "Voyage 13" by Ray Cummings and includes "The Dangerous Dimension" by L. Ron Hubbard.

Final issue.

Cover design C. Barker Petrie. Includes "The Cats Of Ulthar" by H.P. Lovecraft.

Includes "Citadel Of Lost Ships" by Leigh Brackett.

Includes "The Quest Of Tarzan" by Edgar Rice Burroughs.

Includes "The Shriveling Murders" by Zorro.

"The Bloody Wings of the Vampire" by Robert J. Hogan.

Includes "Gunswift" by Jack Byrne.

Includes "Fear" by L. Ron Hubbard. First publication of this novel.

Includes "Large Flying Boats VS. Large Land Planes" by Igor I. Sikorsky.

"Horde of the Black Eagle" by Robert J. Hogan.

"Fangs of the Winged Cobra" by Robert J. Hogan.

Cover by Margaret Brundage. Includes "The Inverness Cape" by August Derleth.

Cover by Margaret Brundage. Includes "The Jest Of Droom Avista" by Henry Kuttner.

"The Mystery of the Golden Skull" by Donald E. Keyhoe.

Final issue.

"Red Skies for the Squadron of Satan" by Robert J. Hogan.

Includes "The Dark Tower" by Wallace West.