Anche pubblicato come “Stella al neutronio”.

Explore fascinating, often chilling “what if” accounts of the world that could have existed–and still might yet…Science fiction’s most illustrious and visionary authors hold forth the ultimate alternate history collection. Here you’ll experience mind-bending tales that challenge your views of the past, present, and future, including:• “The Lucky Strike”: When The Lucky Strike is chosen over The Enola Gay to drop the first atomic bomb, fate takes an unexpected turn in Kim Stanley Robinson’s gripping tale.• “Bring the Jubilee”: Ward Moore’s novella masterpiece offers a rebel victory at Gettysburg which changes the course of the Civil War… and all of American history.• “Through Road No Wither”: After Hitler’s victory in World War II, two Nazi officers confront their destiny in Greg Bear’s apocalyptic vision of the future.• “All the Myriad Ways”: Murder or suicide, Ambrose Harmon’s death leads the police down an infinite number of pathways in Larry Niven’s brilliant and defining tale of alternatives and consequences.• “Mozart in Mirrorshades”: Bruce Sterling and Lewis Shiner explore a terrifying era as the future crashes into the past–with disastrous results.…as well as works by Poul Anderson • Gregory Benford • Jack L. Chalker • Nicholas A. DiChario • Brad Linaweaver • William Sanders • Susan Shwartz • Allen Steele • and Harry Turtledove himself!The definitive collection: fourteen seminal alternate history tales drawing readers into a universe of dramatic possibility and endless wonder

Shoogar was on the warpath. The villagers wondered uneasily if they should pack. The last time their protector had done this he had blown the whole village to hell and they had all had to trek to find a new area. Still, he had proved his point. Shoogar was indeed a mighty witch doctor — and his flock took a kind of resigned pride in his power. After all, who knew what the new invader could do? Better the protector you know than the one you don’t. Had they but known the marvels and monstrosities that Shoogar in his rage would bring about they would have fled shrieking. Which of course they did — for a while. But Shoogar drew them back, for his power was great. And they didn’t really have any place else to go. No place, that is, that had as many interesting possibilities as Shoogar’s wild and woolly mind could conceive …

Nominated for the Hugo Award for Best Novella in 1972.

Like much of Niven's work, the story is heavily influenced by the setting: a gas torus, a ring of air around a neutron star. The gas giant Goldblatt's World (abbreviated "Gold") orbits this star just outside its Roche sphere. Thus, Gold's gravity is insufficient to hold its atmosphere, which is pulled loose into an independent orbit around Voy. This orbiting air forms a ring known as the Gas Torus. The Gas Torus is huge — one million kilometers thick — but most of it is too thin to be habitable. The central part of the Gas Torus, where the air is thicker, is known as the Smoke Ring. The Smoke Ring supports a wide variety of life.There is no “ground” in the Smoke Ring; it is a world consisting entirely of sky. Thus, most animals can fly, even the fish. Furthermore, since the Smoke Ring is in orbit, it is in free fall — there is no “up” or “down”…First publiched in Analog in 1983. Nominated for Nebula Award for Best Novel in 1984.Nominated for Hugo Award for Best Novel in 1985.

LARRY NIVEN'S KNOWN SPACE IS AFLAME WITH WAR!Once upon a time, in the very earliest days of interplanetary exploration, an unarmed human vessel was set upon by a warship from the planet Kzin -- home of the fiercest warriors in Known Space. This was a fatal mistake for the Kzinti, of course; they learned the hard way that the reason humanity had decided to study war no more was that humans were so very, very good at it.And thus began THE MAN-KZIN WARS. Now, several centuries later, the Kzinti are about to get yet another lesson in why it pays to be polite to those hairless monkeys from planet Earth.

The Mind Slavers are back--and only the cat-like Kzinti can save mankind now. This volume includes all-new tales of Larry Niven's Known Space--including one by Niven himself. Another blockbuster in the ongoing chronicle of humanity's greatest war.