Mars 1940
Couverture de Scott

Isles of the Blest • Frederic Arnold Kummer, Jr.
Interplanetary Graveyard • Edmond Hamilton •
After Doomsday • John Cotton • nv
As In the Beginning • Jack Williamson • ss
Ring Around the Sun • Isaac Asimov • ss

Juillet 1940
Couverture de Scott

Liquid Hell • Neil R. Jones • nv
Laughter Out of Space • Dennis Clive • nv
Prophecy of Doom • Ross Rocklynne • ss
The City Under the Sea • Duane W. Rimel • ss
The Magnificent Possession • Isaac Asimov •
The Poison Realm • John Coleridge • ss
Gravity Off! • Leslie F. Stone • ss

Avril 1941
Couverture de Frank R. Paul

30th Century Duel • Manly Wade Wellman
The Genius Bureau • Helen Weinbaum • ss
The Radiant Avenger • E. A. Grosser • ss
Martian Guns • Stanley D. Bell • na
A Prince of Pluto • Paul Dennis Lavond •
Status Quo • R. R. Winterbotham • ss

Aoϋt 1941
Couverture de John R. Forte

They Never Come Back • Fritz Leiber, Jr. • nv
The Time Maker • R. R. Winterbotham • ss
The Topaz Gate • James Blish • ss
The Stone Men of Ignota • Victor Rousseau •
A Million Years and a Day • Lawrence Woods •
The Barbarians • William Morrison • ss
The Shadowless World • Oliver Saari • ss

Octobre 1941
Couverture d'Hannes Bok

The Man on the Meteor • Ray Cummings •
The Thought-Feeders • R. R. Winterbotham • s
Pogo Planet [*Ajax Calkins] • Martin Pearson •
Across the Ages • Dom Passante • ss
Out of Nowhere • E. A. Grosser • ss
Forbidden Flight • Chester B. Conant • ss

Dιcembre 1941
Couverture de Hannes Bok

Around the Universe [*Tuby] • Ray Cummings • na
No Star Shall Fall • Wilfred Owen Morley • ss
Destiny World [*Ajax Calkins] • Martin Pearson •
Day of the Titans • Frederic A. Kummer, Jr. • nv
Quarry • Mallory Kent • ss
Salvage Job • Leslie A. Croutch • ss
Something from Beyond [by Frederik Pohl, Robert A. W. Lowndes & Joseph Harold Dockweiler] • Paul Dennis Lavond • ss
Space Episode • Leslie Perri • ss

Avril 1942
Couverture John R. Forte

The Core • S. D. Gottesman • nv
Mye Day [*Ajax Calkins] • Martin Pearson
The Rebel Slug • Basil Wells • ss
File 384 • Bowen Conway • ss
Two-Way Time • Albert A. Gilmour • ss
Old Man Mars • R. R. Winterbotham • ss
Four Star Planet • Richard Wilson • ss
Galactic Gear • Chester B. Conant • ss
Web of Moons • Hannes Bok • vi
Passage to Sharanee • Carol Grey • ss

Aoϋt 1942
Couverture de Milton Luros

Once in a Blue Moon • Norman L. Knight • na
Ajax of Ajax [*Ajax Calkins] • Martin Pearson • ss
Twilight of Tomorrow • Joseph Gilbert • ss
Rain of Fire • Ray Cummings
Washington Slept Here • Hugh Raymond • ss
Time Exposure • E. A. Grosser • ss
The Case of the Vanishing Cellars [*Wilbur & Stevenson] • J. S. Klimaris •
The Airwhale • James Blish • ss

Juin 1942
Couverture de John R. Forte, Jr.

Invisible Continent • Russell Blaiklock • nv
The Infinite Brain • Hugo Gernsback • vi
The Princess of Detroit • Bob Tucker • ss
The Solar Comedy • James Blish • nv
The Spring Machine • Frederic A. Kummer, Jr.
The World in Balance • Millard Verne Gordon •
The Real McCoy • Hugh Raymond • ss
A Message for Jean • Wilfred Owen Morley • ss

Octobre 1942
Couverture d'Hannes Bok

The Extrapolated Dimwit *Clair & Gaynor] •
S. D. Gottesman • nv
The Powerful Ones • Hugh Raymond • ss
Planet Passage • Martin Pearson • ss
Storm Warning • Millard Verne Gordon • ss
Beauty • Hannes Bok • ss
The Inheritors • John Michel &
Robert A. W. Lowndes •
The Case of the Baby Dinosaur • J. S. Klimaris • nv
Devil's Pawn • Damon Knight • ss
Wide-Open Ship • Richard Wilson • ss
The Collector • Mallory Kent • ss
When the Earth Shook • Walter Kubilius • ss

Dιcembre 1942
Couverture de Robert C. Sherry plus dessin original

The Key to the Dark Planet • Martin Pearson • ss
A Leader for Korcin • F. Orlin Tremaine • nv
The Leapers • Carol Grey • ss
Claggett's Folly • Hugh Raymond • ss
The Creator • Ross Rocklynne • ss
The Cannibals • Oliver E. Saari • ss
Fanatics of Mercury • Henry Andrew Ackermann
The Oomph Beasts • Millard Verne Gordon • ss

Fιvrier 1943
Couverture de Milton Luros

The Second Satellite • Martin Pearson • ss
Dusk on the Moon • Hannes Bok • nv
The Hands • Venard McLaughlin • ss
Planet Alone • Walter Kubilius • ss
When You Think That... Smile! • Dorothy Les Tina 
Too Perfect • Wilbur S. Peacock • ss
...Does Not Imply • Wilfred Owen Morley • ss
Full Circle • Hugh Raymond • ss
Patriotism Plus • Ray Cummings • ss
The Swift People • Basil Wells • ss

Mai-Juin 1950
Couverture de Earle Bergey

Dynasty of the Lost • George O. Smith • nv
Nobody Saw the Ship • Murray Leinster • ss
The Miniature Menace • Frank Belknap Long •
Battle of the Unborn • James Blish • ss
Parking, Unlimited • Noel Loomis • ss
Imitation of Death • Lester del Rey • ss

Juillet-Aoϋt 1950
Couverture de Earle Bergey

Earth Needs a Killer • Bryce Walton • nv
Be Young Again! • Murray Leinster • nv
Martians, Keep Out! • Fritz Leiber, Jr. • ss
Shadows of Empire • Lester del Rey • ss
Two Worlds for One • George O. Smith • ss
Barrier of Dread • Judith Merril • ss

Septembre-Octobre 1950
Couverture de Leo Morey

Wide-Open Planet [*Viagens] • L. Sprague de Camp • 
Flight from Tomorrow • H. Beam Piper • nv
Invitation from the Stars • Morton Klass • ss
Iteration • C. M. Kornbluth • ss
The Long Return • Poul Anderson • nv

Novembre 1950
Couverture de Milton Luros

The World-Mover • George O. Smith • na
The Secret People • James Blish & Damon Knight 
The Terror • Alfred Coppel • ss
Moon of Memory • Bryce Walton • ss
Day of the Hunters • Isaac Asimov • ss
Caridi Shall Not Die! • Walter Kubilius

Janvier 1951
Couverture Milton Luros

The Genius Beasts • James MacCreigh • nv
The Everlasting Exiles • Wallace West • ss
Green Man's Grief • Richard S. Shaver • ss
Slave Psychology • Edwin James • ss
Afterthought • H. B. Fyfe • ss
The Barbarians • William Morrison