He exchanges bodies with his look-alike, Martian Sheb Takkor, and is transported millions of years into the past to a Mars peopled with mighty warriors, beautiful women, and fearsome beasts. Sheb Takkor, a great swordsman in his own right, must fight his way across the deserts and jungles of ancient Mars to save the lovely Princess Thane and to defeat his arch-enemy Sel Han -- or die trying! Edgar Rice Burroughs was the first great writer of planetary adventures. His one true rival and equal at writing planet stories was Otis Adelbert Kline. Kline was on the original editorial staff of Weird Tales, and was literary agent to Robert E. Howard of Conan fame.

    If they fail, the entire world will be doomed.

    The Arisians, using advanced mental technology, have foreseen the invasion of their galaxy by the corrupt and evil Eddorians, so they begin a breeding program on every planet in their universe. Their goal...to produce super warriors who can hold off the invading Eddorians.

    In Sargasso of Space, the Solar Queen free traders win exclusive rights to trade with the planet Limbo, but the crew arrives to find most of the planet’s surface charred, with little signs of life. They find a valley with life, but others may still lurk. Worse yet, a strange force threatens to cripple the Queen. They must solve the planet’s mysteries if they hope to escape not only with tradable goods, but their lives.First of the "Solar Queen" adventures, originally published under the pseudonym "Andrew North." This is the second ace edition.

    The Terran explorers have made an uneasy truce with the Sholen, their first extraterrestrial contact: so long as they don’t disturb the Ilmataran habitat, they’re free to conduct their missions in peace.But when Henri Kerlerec, media personality and reckless adventurer, ends up sliced open by curious Ilmatarans, tensions between Terran and Sholen erupt, leading to a diplomatic disaster that threatens to escalate to war.Against the backdrop of deep-sea guerrilla conflict, a new age of human exploration begins as alien cultures collide. Both sides seek the aid of the newly enlightened Ilmatarans. But what this struggle means for the natives—and the future of human exploration—is anything but certain, in A Darkling Sea by James Cambias.

    He wasn't concerned about getting the wrong man. He knew what the man looked like. There was no way he could make a mistake about his target's identity -- he had the man's skull under his shoulder.

    First, in "The Man of Bronze", the mysterious death of his father leads Doc to the Central American republic of Hidalgo where they discover a lost Mayan empire in the mythical Valley of the Vanished. Can Doc defeat the Feathered Serpent and the Red Death and free King Chaac and the beautiful Princess Monja? Then, in "The Land of Terror", Doc Savage trails the murderous master villain Kar, who controls the deadly Smoke of Eternity, to prehistoric Thunder Island where Doc and his men fight for their very survival against terrifying dinosaurs. In honor of the Man of Bronze's 75th anniversary, this special commemorative edition reprints the classic James Bama cover painting that launched the 1960s Doc Savage revival, along with all the features of the pulp cover edition, interior illustrations by Paul Orban, a never-before-published foreword and autobiographical essay by Lester Dent, and commentary by popular culture historian Will Murray.

    Dietz's acclaimed Legion of the Damned series... There is one final choice for the hopeless, the terminally ill, the condemned criminals, the victims who cannot be saved: becoming cyborg soldiers in the Legion. Their human bodies are destroyed and they are reborn as living weapons. But when aliens attack the Empire, the Legion must choose sides.

    It was waiting for him, just as he had left it. But where? He only knew he was in the center of a galaxy in a universe of galaxies. Within them lay endless varieties of the planet Earth. And there was only one way to find his Earth again: he would have to visit each one. And he would have to hurry--because his search for home had turned into a race with death.

    Science rules the dayside of the globe. Magic rules the World of Night, and Jack of Shadows, Shadowjack the Thief, who broke the Compact and duped the Lord of High Dudgeon, walks in silence and in shadows to seek vengeance upon his enemies.

    Timeless, classic and beyond a doubt one of the foundations of modern Fantasy, the Eternal Champion is a series of stories that no Fantasy aficionado should pass up.Includes The Eternal Champion, Phoenix in Obsidian, To Rescue Tanelorn and The Sundered Worlds.

    These are the great originals of universe-hopping adventure that later writers, including Roger Zelazny in his Amber Series, used as models. Zelazny himself says, "I admire his sense of humor and facility for selecting the perfect final sentence for everything he writes. He can be stark, dark, smoky, bright, and any color of the emotional spectrum...put quite simply, he arouses awe," The tierworld books are full of non-stop action and typify Farmer's boundless imagination. Who else would have thought of stacking up pocket universes like a ziggurat or the layers of a cake? Join Earthlings Robert Wolff and Paul Janus Finnigan (alias Kickaha) on an unforgettable adventure to big for any single world.

    Now at last in one volume, Michael Crichton's Jurassic Park and The Lost World--the two incomparably suspenseful, supremely scary, utterly unputdownable, worldwide best-selling return-of-the-dinosaurs novels, which together constitute Jurassic World.--front flap

    Includes Robert Silverberg's "How It Was When The Past Went Away"; "The Eve of RUMOKO" by Roger Zelazny and "We All Die Naked" by James Blish.

    The military sci-fi classic in a striking new packageFelix is an Earth soldier, encased in special body armor designed to withstand Earth's most implacable enemy-a bioengineered, insectoid alien horde. But Felix is also equipped with internal mechanisms that enable him, and his fellow soldiers, to survive battle situations that would destroy a man's mind.This is a remarkable novel of the horror, the courage, and the aftermath of combat--and how the strength of the human spirit can be the greatest armor of all.