Larry Niven

Ringworld: the most stunning artefact in known space, an artificial world with three million times Earth's surface area. Who built it? And where are they? In this stunning sequel to Larry Niven's Hugo and Nebula award-winning novel, Louis Wu (now a near-hopeless wirehead hooked on electrical ecstasy), the aged Kzin warrior, Speaker-to-Animals, and the Hindmost, puppeteer mate of mad Nessus,...

Pierson's puppeteers, strange, three-legged, two-headed aliens, have discovered an immense structure in a hitherto unexplored part of the universe. Frightened of meeting the builders of such a structure, the puppeteers set about assembling a team consisting of two humans, a puppeteer, and a kzin, an alien not unlike an eight-foot-tall, red-furred cat, to explore it. The artefact is a vast...