Welcome to a world like no other. The Ringworld: a landmark engineering achievement, a flat band 3 million times the surface area of Earth, encircling a distant

Winner of the Hugo and Nebula Awards for best novel Four travelers come to the ringworld. . . Louis Wu: human and old; bored with having lived too fully for far

For decades, the spacefaring species of Known Space have battled over the largest artifactNand grandest prizeNin the galaxy: the all-but-limitless resources and

Come back to the Ringworld . . . the most astonishing feat of engineering ever encountered. A place of untold technological wonders, home to a myriad humanoid r

With an asteroid on a collision course with Earth, Doctor Toby Glyer and his partner William Connors must find a way to make contact with their wayward children