1968 Pyramid Schoenherr Budrys

The Falling Torch, originally uploaded by McClaverty.

1977 Macfadden Prezio Spinrad

The Men in the Jungle by Norman Spinrad. Macfadden Books 1977. Cover artist Victor Prezio., originally uploaded by pulpcrush.

1969 Paperback Powers Moorcock

The Winds of Limbo by Michael Moorcock. Paperback Library 1969. Cover artist Richard Powers, originally uploaded by pulpcrush.

1961 Ballantine Blanchard Kuttner

Bypass to Otherness (1961), originally uploaded by erik_mona.

1967 Belmont Dillon Ellison

belmont B60-069, originally uploaded by Kyle K.

1955 Bantam Hooks Brown

Untitled, originally uploaded by alittleblackegg.

1961 Avon Powers Maine

He Owned the World, originally uploaded by McClaverty.

Digit Pohl Kornbluth

Search the Sky by C.M. Kornbluth and Frederik Pohl. Digit Books. Cover artist unknown, originally uploaded by pulpcrush.

1974 Penguin Pelham Bester

The Demolished Man, originally uploaded by Fin Fahey.

1972 Arrow Zelazny

Creatures of Light and Darkness by Roger Zelazny. Arrow 1972., originally uploaded by pulpcrush.

1964 Ace Gaughan Bulmer

Demons' World, originally uploaded by McClaverty.

1963 Macfadden Powers Dickson

No Room for Man, originally uploaded by McClaverty.

1963 Ace Valigursky Chandler

A. Bertram Chandler - The Ship from Outside - Ace Double F-237 - cover artist Ed Valigursky, originally uploaded by Cadwalader Ringgold.

1973 Quartet Haberfield Farmer

The Wind Whales of Ishmael, originally uploaded by NRJP.

1974 NEL Pennington Williamson Wyndham Leinster

A Sense of Wonder by John Wyndham, Jack Williamson, Murray Leinster. NEL 1974. Cover artist Bruce Pennington, originally uploaded by pulpcrush.

1968 Bantam Harrison

bantam F3722, originally uploaded by Kyle K.

1962 Avon Powers Blish

The Star Dwellers, originally uploaded by McClaverty.

1969 Ace Schoenherr Leiber

Fritz Leiber 1969 Night Monsters Rear Cover by John Schoenherr (Yes, the Rear is The Green Millennium), originally uploaded by CthulhuWho1 (Will Hart).

1959 Berkley Powers Sturgeon

A Touch Of Strange -Theodore Sturgeon., originally uploaded by Jim Linwood.

Gaughan Leinster

Murray Leinster - Sabotage 3 (Luitingh), originally uploaded by horzel.

1976 Berkley Powers Silverberg

Alpha 6, originally uploaded by McClaverty.

1976 Methuen McKie Brunner

The Wrong End of Time by John Brunner. Methuen 1976., originally uploaded by pulpcrush.

1959 Signet Aldiss Powers

No Time Like Tomorrow, originally uploaded by McClaverty.

1975 Berkley Powers Simak

Clifford D. Simak - Our Children's Children - cover artist Richard Powers - reviewed, originally uploaded by Cadwalader Ringgold.

1973 Ace Meltzer Norton

"Plague Ship" by Andre Norton (1973); cover by Davis Meltzer, originally uploaded by CoffeeInSpace.