N° 21 - Janvier 19654
Couverture de Stanley Pitt

 The Other Side • (1951) • shortstory by Walter Kubilius
The Two Shadows • (1951) • novelette by William F. Temple
Walk to the World • (1952) • shortstory by Algis Budrys [as by A. J. Budrys
 

N° 22 - Février 1954
Couverture ?

 Men Against the Stars • (1938) • novelette by Manly Wade Wellman
Ecological Onslaught • (1953) • novelette by Jack Vance (variant of The World Between)
Dark Interlude • (1951) • shortstory by Fredric Brown and Mack Reynolds
 

N° 23 - 1954
Couverture ?

The Lonely Planet • shortfiction by Murray Leinster [as by M. Leinster ]
Go to the Ant • (1952) • novelette by Walter Kubilius
 

N° 24 - 1954
Couverture ?

There Shall Be Darkness • (1942) • novelette by C. L. Moore

N° 25 - 1954
Couverture ?

Never Trust a Martian • shortfiction by Paul W. Fairman (variant of Never Trust a Martian! 1951) [as by P. W. Fairman ]
•Turn Backward O Time! • (1951) • shortstory by Walter Kubilius
•The Barrier • (1952) • shortstory by Murray Leinster
 

N° 26 - 1954
Couverture ?

The Ark of Mars • (1953) • novella by Leigh Brackett
A Matter of Frequency • (1951) • shortstory by William Tenn
 

N° 27 - 1954
Couverture ?

Double Identity • (1953) • novelette by Raymond Z. Gallun
•Fishers of Men • (1953) • shortstory by Hal Annas
 

N° 28 - Août 1954
Couverture de Stanley Pitt

Way of the Gods • (1947) • novella by Henry Kuttner

N° 29 - Septembre 1954
Couverture de Stanley Pitt

Remember Tomorrow • (1941) • novelette by Henry Kuttner

N° 30 - 1954
Couverture ?

Derelict of Space • shortfiction by Randall Garrett
The Chapter Ends • [Psychotechnic League] • (1954) • novelette by Poul Anderson
Captain Barnes and the Law • (1952) • shortstory by Tarr Roman
 

N° 31 - 1954
Couverture ?

The Moving Finger • (1946) • novelette by Berkeley Livingston
Countercheck • (1953) • novelette by Charles V. De Vet [as by Charles De Vet ]
If I Forget Thee, Oh Earth . . . • (1951) • shortstory by Arthur C. Clarke
 

N° 32 - 1954
Couverture ?

Meteor of Death • shortfiction by Berkeley Livingston
The Truthful Pencil • (1944) • shortstory by Berkeley Livingston
 

N° 33 - 1955
Couverture ?

Nine Worlds West • (1951) • novella by Paul W. Fairman

N° 34 - Février 1955
Couverture ?

Sword of Tomorrow • (1945) • novella by Henry Kuttner

N° 35 - 1955
Couverture ?

Common Time • (1953) • novelette by James Blish
Genesis • [Paratime Police] • (1951) • novelette by H. Beam Piper
Last Stand of a Space Grenadier • (1954) shortstory by Donald A. Wollheim [as by David Grinnell ]
 

N° 36 - 1955
Couverture ?

Of Such As These • (1954) • novelette by Irving E. Cox, Jr. [as by Irving Cox, Jr. ]
The Perfect Hideout • (1951) • shortstory by Rog Phillips [as by Gerald Vance ]
 

N° 37 - 1955
Couverture ?

The Guthrie Method • (1954) • novelette by Raymond Z. Gallun
•Desperate Remedy • (1954) • novelette by Mack Reynolds
 

N° 38 - Juillet 1957
Couverture ?

As You Were • (1950) • novelette by Henry Kuttner

N° 39 - 1955
Couverture ?

The Irrationals • (1953) • novelette by Milton Lesser
•The Man Who Walked Through Glass • (1938) • shortstory by Nelson S. Bond [as by Nelson Bond
 

N° 40 - Août 1955
Couverture ?

The Gift of the Gods • (1955) • novelette by Raymond F. Jones
•Cube Sinister • (1951) • shortstory by Arthur G. Stangland
 

N° 41 - 1955
Couverture ?

Stopwatch on the World • (1951) • novelette by Daniel R. Gilgannon