Citadel of the Green Death By: Robert Emmett McDowell

Citadel of the Star Lords By: Edmond Hamilton

Coffin for Jacob By: Edward W. Ludwig

Columbus of Space By: Garrett P. Serviss

Conquest Over Time By: Michael Shaara

Contagion By: Katherine MacLean

Cosmic Castaway By: Carl Richard Jacobi

Countdown By: Kurt Becker. S. J.

Creatures That Time Forgot By: Ray Bradbury

Cry Chaos! By: Dwight V. Swain

Crypt-City of the Deathless One By: Henry Kuttner

Danger in Deep Space (Dramatic Reading) By: Carey Rockwell

Dawn of All By: Robert Hugh Benson

Deadly Dust By: Murray Leinster

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

Herbert West: Reanimator By: H. P. Lovecraft

His Master's Voice By: Randall Garrett

His Wisdom, the Defender: A Story By: Simon Newcomb

Honeymoon in Space By: George Griffith

Hunter Patrol By: H. Beam Piper and John McGuire

I Was a Teen-Age Secret Weapon By: Richard Sabia

Impossibles By: Randall Garrett

In the Clutch of the War-God By: Milo Hastings

Inside Earth By: Poul William Anderson

Invaders from the Infinite By: John Wood Campbell. Jr.

Islands of Space By: John Wood Campbell. Jr.

Jason, Son of Jason By: John Ulrich Giesy

Jetta of the Lowlands By: Ray Cummings

Jewel of Bas By: Leigh Douglass Brackett