Final issue. Cover by H.W. Wesso. Includes "The Cairn On The Headland" by Robert E. Howard.

Includes "The Lonely Planet" by Murray Leinster.

Includes "Flame Of Allah" by Achmed Abdullah.

Final issue thus. Continuing as STREET & SMITH'S AIR TRAILS.

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

Includes "The Dark Tower" by Wallace West.

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

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

Includes "And So To Death" by Cornell Woolrich.

Features "The Headless Men" by Kenneth Robeson.

Cover by Rogers. Includes "Logic Of Empire" by Robert Heinlein.

Cover by M. Isip. Includes "The Roaring Trumpet" by L. Sprague de Camp & Fletcher Pratt.

Includes "Snowbirds" by Eldredge L. Mackay.

Includes "The Hornet Stings" by Samuel Merwin.

Includes "Run, Tiger!" by Donald Barr Chidsey.

Includes "The Northdale Mystery" by Maxwell Grant.

Final issue.

Includes "To Heaven Standing Up" by Paul Ernst.

Features "Dead Man's Chest" by Maxwell Grant.

Cover by Margaret Brundage. Includes "Shadows In Zamboula" by Robert E. Howard.

Cover by Earle Bergey. Includes "The Energy Eaters" by Arthur K. Barnes & Henry Kuttner.

"Sky Coffins for Satan" by Robert J. Hogan.

Cover by Margaret Brundage. Includes "Thunder In The Dawn" by Henry Kuttner.

"Wings of the Doomed" by Robert J. Hogan.

Cover by John Hewitt. Includes "The Red Invader" by Curtis Steele.

Features "The Running Skeletons" by Kenneth Robeson.

Includes "Ace Of Destiny" by Ralph Oppenheim.

"The Mystery of the Dragon's Shadow" by Donald E. Keyhoe.

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

Includes "Swooning Lady" by Kenneth Robeson.

"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.

Includes "Laboratory Of The Damned" by Grant Stockbridge.

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.