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

Cover by Earle K. Bergey. Includes "The Dark Angel" by Henry Kuttner.

Cover by Rogers. Includes "Methuselah's Children" part 1 by Robert Heinlein.

Cover by Margaret Brundage. Includes "Red Nails" by Robert E. Howard.

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

Cover by Margaret Brundage. Includes "A Wig For Miss Devore" by August Derleth.

Cover by Rogers. Includes "The Stars Look Down" by Lester del Rey.

Cover by Rogers. Includes "Breakdown" by Jack Williamson and "The Invaders" by L. Ron Hubbard.

Cover by Rogers. Includes "Space Can" by L. Ron Hubbard.

Includes "The Bat Staffel" by Robert J. Hogan.

"Bombs from the Murder Wolves" by Robert J. Hogan.

Includes "The Seven Sleepers" by Henry Kuttner & A.. Barnes.

Cover by William Timmins. Includes "Clash By Night" by Lawrence O'Donnell.

Includes "The Mind Magnet" by Paul Ernst.

Cover by John Howitt. Includes "Death's Crimson Juggernaut" by Grant Stockbridge.

Includes "Death In A Cockpit" by Arthur J. Burks.

Final issue.

Includes "The Army Without A Country" by Curtis Steele.

Cover by John Howitt. Includes "The Army Of The Dead" by Curtis Steele.

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

Cover by John Howitt. Includes "March Of The Flame Marauders" by Curtis Steele.

Cover by John Howitt. Includes "Cavern Of The Damned" by Curtis Steele.

Cover by John Howett. Includes "Devil's Sculptor" by Arthur J. Burks.

Features "The Running Skeletons" by Kenneth Robeson.

Features "The Headless Men" by Kenneth Robeson.

Formerly THE WIZARD.

Cover by F. Tinsley. Includes "Hawks Of The North" by George L. Eaton.

Includes "Five Aces West" by Cliff Farrell.

Includes "And So To Death" by Cornell Woolrich.

Cover by Rudolph Belarski. Includes short novel "Sons Of The Tall Timber" by Frank R. Pierce.

Cover by Belarski. Includes "The Ringer" by Charles Rice McDowell.

Cover by John Howitt. Includes "The Yellow Scourge" by Curtis Steele.

Cover by William Timmins. Includes "The Weapon Makers" by A. E. van Vogt.

Cover by John Howitt. Includes "The League Of War Monsters" by Curtis Steele.

Cover by Matt Fox. Includes "The Dweller In Darkness" by August Derleth.

Includes "We Fly The Silvaire De Luxe" by William Winter.

Cover by A. R. Tilburne. Includes "The Eager Dragon" by Robert Bloch.

Includes "Fugitives Two" by Robert Carse.

Cover by William Timmins. Includes "The World Is Mine" by Lewis Padgett.

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

Includes "The Spider At Bay" by Grant Stockbridge.

Small digest size format.

Cover by Anderson. Includes "The Star Kings" by Edmond Hamilton.

Includes "Town Marshall" by Walt Coburn.

Includes "Citadel Of Lost Ships" by Leigh Brackett.

Cover by Hannes Bok. Includes " Bramwell's Guardian" by August Derleth.

Cover by Margaret Brundage. Includes "The Feast In The Abbey" by Robert Bloch.

Continuing from CAPTAN SATAN.

Includes "The Crime Laboratory" by Grant Stockbridge.

Cover by E. Franklin Wittmack. Includes "Yours Truly...Jack The Ripper" by Robert Bloch.

Includes "12 Must Die" by Zorro.

Cover by Herbert Morton Stoops. Includes "Swords Of Mars" by Edgar Rice Burroughs.

Includes "The Voice Of The Lobster" by Henry Kuttner.

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

Features "Alibi Trail" by Maxwell Grant.

Final issue.

Includes "The Seal Of Sin" by Henry Kuttner.

Cover by Frank Kelly Freas. Includes "Sexton, Sexton, In The Wall" by August Derleth.

Cover by John Howitt. Includes "The Wheel Of Death" by R. T. M. Scott.

Final issue.

Includes "Heredity" by Isaac Asimov.

Rare.

Includes "The Hag Seleen" by Theodore Sturgeon & James H. Beard.

Includes "Give Me Ten Men" by Charles Marquis Warren.

Cover by Modest Stein. Features "Overthrow" by Cleve Cartmill.

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

Cover by Margaret Brundage. Includes "The Shambler From The Stars" by Robert Bloch.

Includes "Speak For Yourself" by John Quincy.

Includes "Hell Below" by Kenneth Robeson.

Cover by Earle K. Bergey. Includes "Other Eyes Watching" by Polton Cross.

Final issue. Cover by Earle K. Bergey. Includes "Days Of Creation" by Brett Sterling.

Includes "Nazi Terror Over New York" by Robinson MacLean.

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

"Aces of the Damned" by Robert J. Hogan.

Cover by John Howitt. Includes "Citadel Of Hell" by Grant Stockbridge.

Includes "Crime's Stronghold" by Maxwell Grant.

Cover by Rogers. Includes "Slan" part 2 by A. E. van Vogt.

Cover by Schneeman. Includes "Worlds Don't Care" by Nat Schachner.