Juillet 1939
Couverture de Leo Morey et back vover de Frank R. Paul

The Scientists Revolt • Edgar Rice Burroughs • 
The Golden Amazon [*Golden Amazon (Violet Ray)] • Thornton Ayre • nv
The Tipping Earth • Morrison Colladay • ms
The Monster from Nowhere • Nelson S. Bond • 
Intrigue in Lemuria • Frederic Arnold Kummer, Jr. 
She Walked Alone • John Russell Fearn • ss
Invaders from Sirius • Ed Earl Repp • nv

Septembre 1939
Couverture de H.W. McCauley et back cover de Frank R. Paul

Horror Out of Carthage • Edmond Hamilton • 
Golden Girl of Kalendar [*Jalu] • F. Orlin Tremaine 
The Amazing Invention of Wilberforce Weems • Nelson S. Bond • ss
City under the Sea • Nat Schachner • nv
The Man Who Saw Too Late • Eando Binder • 
The Insect Invasion • Frederic Arnold Kummer, Jr. • ss

Novembre 1939
Couverture de Robert Fuqua and original cover art et back cover de Frank R. Paul

The Man from Hell • Polton Cross • na
The Purple Conspiracy • Stanton A. Coblentz • 
F.O.B. Venus [*Lancelot Biggs] • Nelson S. Bond 
Into Another Dimension • Maurice Duclos • nv
Lunar Intrigue • Thornton Ayre • nv
Pioneer—1957! [by Raymond A. Palmer] • Henry Gade • nv

Janvier 1940
Couverture deH.W.McCauley et back cover de Frank R. Paul

The Robot Peril • Don Wilcox • na
Death Over Chicago • Robert Moore Williams 
The Time Merchant • Frederic Arnold Kummer,Jr
Captives of the Void • R. R. Winterbotham • 
Hell in Eden • Richard O. Lewis • nv
The Gift of Magic • Miles Shelton • nv

Fιvrier 1940
Couverture de Robert Fuqua et back cover de Frank R. Paul

New York Fights the Termanites • Bertrand L. Shurtleff • nv
The Prince of Mars Returns [Part 1 of 2] • Phil Nowlan • nv
Lancelot Biggs Cooks a Pirate [*Lancelot Biggs] • Nelson S. Bond • ss
Thunor Flees the Devils • Russell Storm • nv
Mystery of the White Raider • Thornton Ayre • nv
Let War Gods Clash! • Don Wilcox • nv

Mars 1940
Couverture de Robert Fuqua et back cover de Frank R. Paul

The Little People [*Little People] • Eando Binder
Jalu of Radiant Valley [*Jalu] • Orlin Tremaine • 
The Man Who Weighed Minus Twelve • Nelson S. Bond • ss
Volcano Slaves of Mu • Frederic Arnold Kummer, Jr. • nv
Lunar Loot • Edwin Benson • ss
The Prince of Mars Returns [Part 2 of 2] • Phil Nowlan • nv

Avril 1940
Couverture de Frank R. Paul
et back cover

The Blue Tropics • James Norman • nv
The Man the World Forgot • John York Cabot • 
Land of Wooden Men • John Broome • nv
The Judging of the Priestess [*Meg] • Nelson S. Bond • nv
Queen of the Metal Men • Robert Bloch • ss
The Madness of Lancelot Biggs [*Lancelot Biggs] • Nelson S. Bond • 
Norris Tapley's Sixth Sense • Ed Earl Repp • nv

Mai 1940
Couverture de Stockton Mulford

The Whispering Gorilla [with David Vern; *Whispering Gorilla] • Don Wilcox • na
Lancelot Biggs: Master Navigator [*Lancelot Biggs] • Nelson S. Bond • ss
The Shining Man • Noel Gardner • nv
Worlds at War • Ed Earl Repp • nv
The Wizard of Baseball • Milton Kaletsky • ss
50 Miles Down [by Henry Kuttner] • Peter Horn • nv
 

Juin 1940
Couverture de Stockton Mulford

Dr. Destiny, Master of the Dead • Robert Moore Williams • nv
Trouble in Avalon • Russell Storm • ss
The Reflection That Lived • Ross Rocklynne • 
The World in the Atom • Ed Earl Repp • nv
Sabotage on Mars • Maurice Duclos • nv
The Genius of Lancelot Biggs [*Lancelot Biggs] • Nelson S. Bond • ss
The Man Who Came Back • Richard O. Lewis • ss
The Amazon Fights Again [*Golden Amazon (Violet Ray)] • Thornton Ayre • nv

Aoϋt 1940
Couverture de H.W. McCauley

The Golden Princess • Robert Moore Williams • 
The Fertility of Dalrymple Todd • Nelson S. Bond
The Human Blood Hound • Edward Podolsky • 
The Strange Voyage of Hector Squinch • David Wright O'Brien • nv
The Ray That Failed [*Oscar Wilbury] • Donald Bern • ss
War of Human Cats • Festus Pragnell • nv
World Without Air • Henry Kuttner • ss
The Girl in the Whirlpool [*Ebbtide Jones] • Miles Shelton • ss

Octobre 1940
Couverture de J. Allen St John

Jongor of Lost Land [*Jongor] • Robert Moore Williams • na
Oscar, Detective of Mars [*Oscar] • James Norman
Special Agent to Venus • Thornton Ayre • nv
The Uncanny Power of Edwin Cobalt • Noel Gardner
The Scientific Miler of Bowler U. • Ivan Sandrof • 
The Elixir of Invisibility • Henry Kuttner • nv