Contents:
Introduction by Barry N. Malzberg
The Battle of Long Island by Nancy Kress
The Man Who Came Early by Poul Anderson
Forever to a Hudson Bay Blanket by James Tiptree, Jr.
Anachron by Damon Knight
On the Nature of Time by Bill Pronzini
A Little Something for Us Tempunauts by Philip K. Dick
Ripples in the Dirac Sea by Geoffrey A. Landis
Hall of Mirrors by Fredric Brown
3 Rms Good View by Karen Haber
Time Trap by Charles L. Harness
Brooklyn Project by William Tenn
Timetipping by Jack M. Dann
The Chronology Protection Case by Paul Levinson
Hawksbill Station by Robert Silverberg
Time Travelers Never Die by Jack McDevitt

The Interbeing League had been formed to make contact with new intelligent races in the galaxy and offer them membership. But when the League encountered the Hokas, furry creatures strongly resembling the teddy-bears of Earth, the League's agent, Alexander Jones, could have been excused for wishing he had a simpler assignment than making sense out of the Hokas - such as single-handedly stopping an interstellar war. Not that the fuzzy aliens were unfriendly. In fact, they loved everything about humans, and adopted various Terran cultures wholesale and in every little detail-but with a bit of confusion about the differences between fact and fiction. So if the Hokas suddenly started acting out the parts in a rip-roaring, shoot-em-up western, or brought to life the London of Sherlock Holmes, complete with a pipe-puffing, deerstalker-wearing Hoka, or suddenly decided to fly the Jolly Roger and lead a life of adventure and piracy on the high seas, matey, that was only to be expected. And as the Hokas threw themselves wholeheartedly into progressively wilder worlds from Terran history and fiction, Jones could be excused for feeling that his grip on reality was hanging by a single, thin, increasingly frayed thread...

In the year of grace 1345, as Sir Roger Baron de Tourneville is gathering an army to join King Edward III in the war against France, a most astonishing event occurs: a huge silver ship descends through the sky and lands in a pasture beside the little village of Ansby in northeastern Lincolnshire. The Wersgorix, whose scouting ship it is, are quite expert at taking over planets, and having determined from orbit that this one was suitable, they initiate standard world-conquering procedure. Ah, but this time it's no mere primitives the Wersgorix seek to enslave; they've launched their invasion against free Englishmen! In the end, only one alien is left alive; and Sir Roger's grand vision is born. He intends for the creature to fly the ship first to France to aid his King, then on to the Holy Land to vanquish the infidel. Unfortunately, he has not allowed for the treachery of the alien pilot, who instead takes the craft to his home planet, where, he thinks, these upstart barbarians will have no choice but to surrender. But that knavish alien little understands the indomitable will and clever resourcefulness of Englishmen, no matter how great the odds against them. . .

The prequel to the popular Operation Luna .

In a war waged against black magic, a werewolf and his witch wife are called upon to neutralize an enemy's ultimate weapon--the world's most powerful demon.

Set in a fantasy alternate history United States where magic and technology combine. Werewolfery is not only hereditary, but a recessive gene, and the polarized component of moonlight has been isolated, so that the hero can use a Were-flash to transform without the full moon.

A Revelation of the Planet Venus in Fact and Fiction by Arthur C. Clarke - C.S. Lewis - Olaf Stapledon - Poul Anderson and many others.
The swirling clouds of mystery that cloak the planet Venus have exercised an unrivaled fascination for the most powerful imaginations of our day. Now at last their most dazzling flights have been gathered together.

Contents:

I. CLOUDED JUDGEMENTS
Destinies of the Stars by Svante Arrhenius
Last and First Men by Olaf Stapledon
Pirates of Venus by Edgar Rice Burroughs
Perelandra by C.S. Lewis

II. "VENUS IS HELL!"
Exploring the Planets by V.A. Firsoff
The Big Rain by Poul Anderson
Intelligent Life in the Universe by Carl Sagan

III. BIG SISTER
Escape to Venus by S. Makepeace Lott
Sister Planet by Poul Anderson
Before Eden by Arthur C. Clarke

IV. THE OPEN QUESTION
Some Mysteries of venus resolved by Sir Bernard Lovell
Dream of Distance by Anonymous
Venus Mystery for Scientists by John Davy

What will the end of the Earth's lifespan look like? What will happen to the humans left on the planet when it fades into obsolescence? These are just a few of the profound questions at the center of science fiction master Poul Anderson's thought-provoking tale The Chapter Ends.

Dentre as temáticas do universo sci-fi, nenhuma delas é tão popular, envolvente e plural quanto as viagens no tempo. Esta coletânea reúne, em um único volume e pela primeira vez no Brasil, dezoito contos de alguns dos gigantes do universo sci-fi, abrangendo cinco décadas, de 1940 a 1990, e incluindo desde “Um Som de Trovão”, de Ray Bradbury, que inspirou o nome da famosa teoria do Efeito Borboleta, até Ursula K. LeGuin, em “Outra História ou um Pescador do Mar Interior”, ou mesmo uma ideia impensável, como no conto do premiado Jack Dann “Inversão do Tempo”, que propõe respostas surpreendentes para uma pergunta perturbadora: e se todos viajassem no tempo, menos você?

Thor broke the sword Tyrfing to save the roots of Yggdrasil, the tree that binds earth, heaven and hell. Now the elves need the weapon for their war against the trolls. Only Scafloc, a human kidnapped and raised by elves, can hope to persuade Bolverk the ice-giant to make Tyrfing whole again. But Scafloc must also confront his shadow self, Valgard, the changeling in his place among men.

Years after Earth is devastated by nuclear weapons, the survivors of a floating solar station above Europe assist the emergence of a low-tech civilization, until a treacherous faction seizes control of the station. Reissue.

In a futuristic Earth civilization that has emerged from a deadly Ice Age that has destroyed all previous life, the freedom-loving Seafolk try to recover lost technology from the past while resisting a repressive Empire. Reprint.

Source title: Mirkheim (Future History of the Polesotechnic League)

Thor broke the sword Tyrfing to save the roots of Yggdrasil, the tree that binds earth, heaven and hell. Now the elves need the weapon for their war against the trolls. Only Scafloc, a human kidnapped and raised by elves, can hope to persuade Bolverk the ice-giant to make Tyrfing whole again. But Scafloc must also confront his shadow self, Valgard, the changeling in his place among men.