ANT MEN, THE by Eric North—Geologists find living fossils in the badlands of Central Australia

ATTACK FROM ATLANTIS by Lester del Rey—An atomic submarine crew discovers the lost city of Atlantis

BATTLE ON MERCURY by Erik Van Lhin—Sun storms sweep Mercury and threaten man's existence

DANGER: DINOSAURS! by Richard Marsten—A treacherous big-game hunter leads an expedition back to the Age of Reptiles

EARTHBOUND by Milton Lesser—An ex-space cadet is forced to plunder ships he was trained to protect

FIVE AGAINST VENUS by Philip Latham—A Moon-bound rocket crashes in the misty wilds of Venus

ISLANDS IN THE SKY by Arthur C. Clarke—A teen-ager's adventures aboard a space station

LOST PLANET, THE by Paul Dallas—Two worlds on the verge of war

MAROONED ON MARS by Lester del Rey—A teen-ager on the first Moon-to-Mars expedition

MISSING MEN OF SATURN by Philip Latham—A space crew is held prisoner by froglike men on Saturn

MISSION TO THE MOON by Lester del Rey—Scientists make man's first journey to the Moon

MISTS OF DAWN by Chad Oliver—A space-time machine hurls a 20th-century boy back to 50,000 B. C.

MYSTERIOUS PLANT, THE by Kenneth Wright—A young captive on Planet X prevents Earth's destruction

MYSTERY OF THE THIRD MINE by R.W. Lowndes—Prospecting in the dangerous asteroid belt

PLANET OF LIGHT by Raymond F. Jones—A trip to another planet shows how the universe can be saved from destruction

ROCKET JOCKEY by Philip St. John—A space pilot battles Martians in rocket race

ROCKET TO LUNA by Richard Marsten—A stowaway on a Moon-bound rocket proves his worth

ROCKETS TO NOWHERE by Philip St. John—Scientists establish a colony on the Moon

SECRET OF THE NINTH PLANET, THE by Donald A. Wollheim—A high-school senior investigates the theft of the solar system's light

SECRET OF SATURN'S RINGS, THE by Donald A. Wollheim—A scientist proves his theories by means of a unique invention

SECRET OF THE MARTIAN MOONS, THE by Donald A. Wollheim—Scientists discover the secrets of Martian civilization

SON OF THE STARS by Raymond F. Jones—An interplanetary friendship brings Earth to the brink of destruction

SONS OF THE OCEAN DEEPS by Bryce Walton—Undersea terrors nearly thwart a project aimed at saving a continent

STAR CONQUERORS, THE by Ben Bova—The Terran Confederation battles for its existence against the all-powerful rulers of the Milky Way Galaxy

STAR SEEKERS, THE by Milton Lesser—A tale of a spaceship doomed to crash

STEP TO THE STARS by Lester del Rey—The U. S. builds a space station

TROUBLE ON TITAN by Alan E. Nourse—A rocket experimenter discovers a plot threatening Earth's existence

VANDALS OF THE VOID by Jack Vance—A tale of space pirates

VAULT OF THE AGES by Poul Anderson—Life 500 years after the flaming collapse of 20th-century civilization

WORLD AT BAY, THE by Paul Capon—Men from another planet attack Earth

YEAR WHEN STARDUST FELL, THE by Raymond Jones—A mysterious "fall-out" paralyzes civilization