Devil in Iron By: Robert E. Howard

Devolutionist and the Emancipatrix By: Homer Eon Flint

Doomsday Eve By: Robert Moore Williams

Douglas Duane By: Edgar Fawcett

Dragon Queen of Jupiter By: Leigh Douglass Brackett

Earthman on Venus By: Ralph Milne Farley

Entirely New Feature of a Thrilling Novel! Entitled, The Social War of the year 1900; or, The Conspirators and Lovers! By: Simon Landis

Equation of Doom By: Gerald Vance

Evacuation of England: The Twist in the Gulf Stream By: Louis Pope Gratacap

Fire People By: Ray Cummings

First Lensman By: E. E. Smith

First on the Moon By: Jeff Sutton

Fixed Period By: Anthony Trollope

Flame Breathers By: Ray Cummings

Food of the Gods, and How It Came to Earth (version 2) By: H. G. Wells

Forgotten Planet By: Murray Leinster

Four Science Fiction Novellas By: Harl Vincent

Four Science Fiction Stories By: Alan E. Nourse

Four Science Fiction Stories by G.L.Vandenburg By: G. L. Vandenburg

From the Earth to the Moon, Version 2 By: Jules Verne

Futuria Fantasia, Spring 1940 By: Ray Bradbury

Galaxy Primes By: E. E. Smith

Gambler's World & The Yillian Way By: Keith Laumer

Giphantia By: Charles-François Tiphaigne de La Roche

Gladiator By: Philip Wylie

Great Explorers in Space By: Various

Green Millennium By: Fritz Leiber

Green Odyssey (version 2) By: Philip José Farmer

Green World By: Hal Clement

Happy Unfortunate By: Robert Silverberg

Hartmann the Anarchist, or the Doom of a Great City By: Edward Douglas Fawcett

Heads of Cerberus By: Francis Stevens