Cover by Howard V. Brown. Includes feature novel "Blue Magic" by Charles Willard Diffin. Also "The Red Peri" by Stanley G. Weinbaum.

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.

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

Cover by Matt Fox. Includes "The Place With Many Windows" by Allison V. Harding.

Cover by Margaret Brundage. Includes "Witch House" by Seabury Quinn and "The Dark Demon" by Robert Bloch.

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

Cover by Lawrence. Includes "Death Crystal" by George O. Smith.

Includes "Typewriters In The Sky Part 1" by L. Ron Hubbard.

Includes "Sands Of Sahara" by Robert Carse.

Includes "Wet Magic" by Henry Kuttner.

Includes "A God In A Garden" by Theodore Sturgeon.

Cover by H. W. Scott. Includes "Danger In The Dark" by L. Ron Hubbard.

Cover by Margaret Brundage. Includes "The Faceless God" by Robert Bloch.

Cover by Margaret Brundage. Includes "The Hour Of The Dragon" by Robert E. Howard.

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

Formerly THE WIZARD.

Cover by John Howitt. Includes "Master Of The Death Madness" by Grant Stockbridge.

Includes "The Gentleman From Hell" by Grant Stockbridge.

Cover by Ed Cartier. Includes "The Reign Of Wizardry" by Jack Williamson.

Includes "Gunswift" by Jack Byrne.

"Here Flies the Hawk of Hell" by Robert J. Hogan.

Includes "Blow Cold, Blow Hot" by Frederick C. Davis.

Cover by Earle K. Bergey. Includes "Magic Moon" by Brett Sterling.

Includes "Wine Of The Dreamers" by John D. MacDonald.

Cover by Edd Cartier. Includes "All Is Illusion" by Henry Kuttner.

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

Cover by Margaret Brundage. Includes "Iron Mask" by Robert Bloch.

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

Death Had Yellow Eyes, digest size.

Cover by Margaret Brundage. Includes "Slave Of The Flames" by Robert Bloch.

Cover by A. R. Tilburne. Includes "Bang! You're Dead" by Ray Bradbury.

"The Men Who Smiled No More" by Kenneth Robeson.

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

Cover by Margaret Brundage. Includes "Quest Of The Starstone" by C. L. Moore & Henry Kuttner.

Cover by George Rozen. Includes "The Sky Hawk Screams" by Arthur Guy Empy.

Includes "A Gentleman In Pajamas" by Charles Neville Buck.

Cover by Frandzen. Features "Fighting Mongrel" by George Bruce.

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

Cover by Schneeman. Includes "The Merman" by L. Sprague de Camp.

Includes "Purple Aces" by Robert J. Hogan.

"Death Rides the Lost Patrol" by Robert J. Hogan.

Cover by J. Allen St. John. Includes "Buccaneers Of Venus (Part 2)" by Otis Adelbert Kline.

Cover by Rudolph Belarski. Includes "The Water World" by Oscar J. Friend.

Cover by A. R. Tilburne. Includes "Satan's Phonograph" by Robert Bloch.

Includes "The Day To Come" by Don Tracy.

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

Cover by John Howett. Includes "Vault Of The Damned" by Nat Schachner.

Cover by John Howitt. Includes "Reign Of The Silver Terror" by Grant Stockbridge.

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

Includes "Mystery On Happy Bones" by Kenneth Robeson.

Cover by Rogers. Includes "Time Wants A Skeleton" by Ross Rocklynne.

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

Includes "The Shriveling Murders" by Zorro.

Cover by Jack Coggins. Includes "Turncoat" by Damon Knight

"Winged Beasts of Death" by Robert J. Hogan.

Cover by Hannes Bok. Includes "Beauty's Beast" by Robert Bloch.

Includes "Farewell To Balloon Racing" by Samuel Taylor Moore.

Cover by A. von Munchhausen. Features "Lunar Landing" by Lester Del Ray and "The Beast" by L. Ron Hubbard.

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

Cover by A. R. Tilburne. Includes "The Beasts Of Barsac" by Robert Bloch.

Cover by Virgil Finlay. Features "Globe of Memories" by Seabury Quinn.

Features "The Time Terror" by Kenneth Robeson.

Includes "The Men Vanished" by Kenneth Robeson.

Final issue.

Cover by Earle K. Bergey. Includes "The Portal In The Picture" by Henry Kuttner.

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

"Sky-Guns for the Murder Master" by Robert J. Hogan.

Includes "The Faceless Men" by Arthur Leo Zagat.

Cover by Virgil Finlay. Includes "Fane Of The Black Pharaoh" by Robert Bloch.

Includes "Pony Express Rider" by A. Leslie.

Includes "Air Cops In The Land Of The Shiek" by Edward Daly.

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

Includes "The Mind Magnet" by Paul Ernst.

Features "Murder Lake" by Maxwell Grant.

Cover by Margaret Brundage. Includes "The Fiddler's Fee" by Robert Bloch.

Cover by Pete Kuhlhoff. Includes "The Skull Of The Marquis De Sade" by Robert Bloch.

Includes "Murder Nightmare" by Norman A. Daniels.

Includes "He Didn't Like Cats" by L. Ron Hubbard.

Cover by Walter Popp. Includes "Big Planet" by Jack Vance.

Cover by Rogers. Includes "Asylum" by A. E. van Vogt.

Cover by Ed Emsh. Includes "The Spiral Of The Ages" by Fletcher Pratt.

Cover by Rudolph Belarski. Includes "The Bottom Of The World" by John Coleman Burroughs & Hulbert Burroughs.

Cover by Alex Schomburg. Includes "Death Of Iron" by S. S. Held.

Cover design by C.C. Serf. Includes "The Hyena" by Robert E. Howard.

Features "The Terrible Stork" by Kenneth Robeson.

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

Features "Bequest of Evil" by Kenneth Robeson.

Cover by Margaret Brundage. Includes "Lansing's Luxury" by August Derleth.

Cover by Alex Schomburg. Includes "The White Widows" by Sam Merwin, Jr.

Cover by Jack Coggins. Includes "Asylum Earth" by Bruce Elliott.

Cover by Graves Gladney. Includes "The Bronze Door" by Raymond Chandler. Only appearance of this short story.

Cover by John Howitt. Includes "The Pain Emperor" by Grant Stockbridge.

"The Sky Serpent Flies Again" by Robert J. Hogan.

Cover design by E.M. Stevenson. Includes "He" by H.P. Lovecraft.

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

Final issue.

Final issue.

Summer issue. Includes "The Whispering Eyes".

Includes "The Crocodile!" by Theodore Roscoe.

Cover by Walter Popp. Includes "The Wages Of Synergy" by Theodore Sturgeon.

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

Cover by Emsh. Includes "Name Your Pleasure" by James E. Gunn.

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

Features "Alibi Trail" by Maxwell Grant.

Cover by Margaret Brundage. Includes "The Black Kiss" by Robert Bloch & Henry Kuttner.

Cover by Brundage. Includes "The People Of The Black Circle (part 2) by Robert E. Howard, This is an early Conan story.

Includes "The Synthetic Men of Mars" by Edgar Rice Burroughs

Cover by H. W. Brown. Includes "Mercutian Adventure" by Raymond Z. Gallun.

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

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

Includes "Her Lover-Death".

Cover by Virgil Finlay. Includes "The Drifting Snow" by August Derleth.

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

Includes "The Crime Laboratory" by Grant Stockbridge.