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

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

Includes "Assignment In Guana" by George Harmon Coxe.

Cover by Graves Gladney. Includes "Coils Of Time" by P. Schuyler Miller.

Includes "The Triumph Of Captain Future" by Edmond Hamilton.

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

Cover by John Howitt. Includes "Attack Of The Blizzard Men" by Curtis Steele.

Final issue.

Includes "The Seal Of Sin" by Henry Kuttner.

Includes "The Getaway Ring" by Maxwell Grant.

Features "Masters of Death" by Maxwell Grant.

Cover by John Howitt. Includes "Slaves Of The Crime Master" by Grant Stockbridge.

Cover by John Howitt. Includes "Death Reign Of The Vampire King" by Grant Stockbridge.

Includes "Via Jupiter" by Eando Binder.

Cover by Anderson. Includes "The Kingslayer" by L. Ron Hubbard.

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

Cover by John Giunta. Includes "Kingsridge 214" by August Derleth.

Cover by Charles A Kennedy. Includes "A Knocking In The Wall" by August Derleth.

Includes "The Land Of Time To Come" by Henry Kuttner.

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

Cover by Virgil Finlay. Includes "The Lost Path" by August Derleth.

Features "The Invisible Box Murders" by Kenneth Robeson.

Cover by Earle Bergey. Includes "Absalom" by Henry Kuttner.

Includes "The Money Master" by Maxwell Grant.

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

"Wings of the Gray Phantom" by Robert J. Hogan.

Cover by John Howitt. Includes "Reign Of The Death Fiddler" by Grant Stockbridge.

Includes "Brethren Of Death" by George L. Eaton.

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

Includes "Speak For Yourself" by John Quincy.

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

Cover by Margaret Brundage. Includes "The Six Sleepers" by Edmond Hamilton.

Cover by H. W. Wesso. Includes "People Of The Dark" by Robert E. Howard.

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

Cover by Earle Kulp Bergey. Includes "Dragon's Island" by Jack Williamson.

Cover by Hannes Bok. Includes "Mannikins Of Horror" by Robert Bloch.

Features "The Time Terror" by Kenneth Robeson.

Summer issue. Includes "The Whispering Eyes".

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

Cover by Virgil Finlay. Includes "Spotted Satan" by Otis A. Kline.

Cover by Earle Bergey. Includes "The Lake Of The Gone Forever" by Leigh Brackett.

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

Includes "The Spider At Bay" by Grant Stockbridge.

Cover by Rudolph Belarski. Includes Black Bat story "Death For Charity" by G. Wayman Jones.

Includes "Border Patrol" by Lieut. P. S. Lyons.

Includes "Heredity" by Isaac Asimov.

Cover by H. W. Wesso. Includes "The Shadow In The Sky" by August W. Derleth.

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

First appearance of a Tarzan-like character named Ka-Zar. Cover painting by J. W. Scott. Includes "King Of Fang And Claw" by Bob Byrd.

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

Final issue.

Final issue. Includes "Emeralds Of The Inca" by George Creel.

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

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

Includes "Winged Warriors" by Lieut. Scott Morgan

Cover by Anthony Di Giannurio. Includes "Black As The Night" by Alice Farnham.

Final issue.

Includes "The Nightmare Town" by Dashiell Hammett.

Cover by Jon Arfstrom. Digest size.

Includes "Captain Future And The Seven Space Stones" by Edmond Hamilton.

Cover by John Howitt. Includes "Prince Of The Red Looters" by Grant Stockbridge.

Includes "When The River Ran White" by Harry Sinclair Drago.

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

Cover by Earle K. Bergey. Includes "The Lovers" by Philip Jose Farmer. Featuring George Chance, a stage magician turned hero, The Ghost, Super-Detective (as it was originally called) was a low-budget effort from the start, featuring only the lead novel

Features "Messenger of Death" by Maxwell Grant.

Includes "Laboratory Of The Damned" by Grant Stockbridge.

Includes "The Mathematics Of Magic" by L. Sprague de Camp & Fletcher Pratt.

Includes "The Crime Laboratory" by Grant Stockbridge.

Features "Peril in the North" by Kenneth Robeson.

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

Cover by Ed Cartier. Includes "Death's Deputy" by L. Ron Hubbard.

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

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