Winner of both the Hugo and Nebula Awards for Best Novel, Ringworld remains a favorite among science fiction readers.

The artifact is a vast circular ribbon of matter, some 180 million miles across, with a sun at its center. Pierson's puppeteers—strange, three-legged, two-headed aliens—discovered this "Ringworld" in a hitherto unexplored part of the galaxy. Curious about the immense structure, but frightened by the prospect of

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Louis Wu, two hundred years old but still considering himself a young adventurer, becomes one of the first humans to set foot on the Ringworld, and odd events follow closely behind as he contends with the destruction of incoming spacecraft and a large gathering of vampires.

Set in the year 2085, "The Moon Maze Game" tells the story of a deadly live-action role-playing game conducted on the Moon itself.

"Worlds closer to the galatic core than Known Space are --or were-- home to intelligent speciers. Some learned of the core explosion in time to flee. Destroyer of Worlds opens in 2670, ten years after Juggler of Worlds closes; with refugee species fleeing in an armada of ramscoops in the direction of the Fleet of Worlds. The onrushing aliens are recognized as a threat; they have left in their trail a host of desolated worlds: some raided for supplies,...

"After 200 years in cryosleep, Jaybee Corbell awakens to find that his mind has been downloaded to another body and he's in servitude to a harsh future State. Following his escape via a spaceship, he traverses such vast distances--with accompanying time dilations--that he returns to Earth 3 million years later to discover a world wholly alien to the one he'd left"--Page 4 of cover.

To house the dying Earth's inhabitants, a huge architectural ring is constructed in outer space. With gravity, an atmosphere, and a temperate climate, Ringworld gives humanity a new lease on life, but not without frightening consequences.