"This rousing sequel to the classic Ringworld continues the adventures of Louis Wu and Speaker-to-Animals on that fantastic planet."--School Library Journal An ALA Best Book for Young Adults

Pierson's puppeteers, three-leg two-head aliens find immense structure in unexplored part of the universe. Frightened of meeting the builders, they send a team of two humans, a puppeteer and a kzin, eight-foot red-fur catlike alien. Ringworld is 180 million miles across, sun at center. But the expedition crashes, and crew face disastrously long trek.

Come back to the Ringworld . . . the most astonishing feat of engineering ever encountered. A place of untold technological wonders, home to a myriad humanoid races, and world of some of the most beloved science fiction stories ever written! The human, Louis Wu; the puppeteer known as the Hindmost; Acolyte, son of the Kzin called Chmeee . . . legendary beings brought together once again in the defense of the Ringworld. Something is going on with the Protectors. Incoming spacecraft are being destroyed before they can reach the Ringworld. Vampires are massing. And the Ghouls have their own agenda--if anyone dares approach them to learn. Each race on the Ringworld has always had its own Protector. Now it looks as if the Ringworld itself needs a Protector. But who will sit on the Ringworld Throne? "Niven's work has been an intriguing and consistent universe, and this book is the keystone of the arch. . . . [His] technique is wonderfully polished, his characters and their situations are nicely drawn . . . wraps up (maybe) a corner of a very interesting universe". --San Diego Union-Tribune

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 star. Home to trillions of inhabitants, not all of which are human, and host to amazing technological wonders, the Ringworld is unique in all of the universe. Explorer Louis Wu, an Earth-born human who was part of the first expedition to Ringworld, becomes enmeshed in interplanetary and interspecies intrigue as war, and a powerful new weapon, threaten to tear the Ringworld apart forever. Now, the future of Ringworld lies in the actions of its children: Tunesmith, the Ghoul protector; Acolyte, the exiled son of Speaker-to-Animals, and Wembleth, a strange Ringworld native with a mysterious past. All must play a dangerous game in order to save Ringworld's population, and the stability of Ringworld itself. Blending awe-inspiring science with non-stop action and fun, Ringworld's Children, the fourth installment of the multiple award-winning saga, is the perfect introduction for readers new to this New York Times bestselling series, and long-time fans of Larry Niven's Ringworld.

Ringworld’s Children returns series protagonist Louis Wu to the titular world. Louis and his friend The Hindmost, an alien of the Pierson’s puppeteer race, are prisoners of the Ghoul protector Tunesmith, a Ringworld native, who is deliberately provoking the warships that surround his world. All the star-faring races of Known Space have sent warships to the Ringworld, and they are already at the brink of war. If fighting breaks out, the near-indestructible Ringworld will be destroyed: dissolved by antimatter weapons. The Ringworld series is so complex and ambitious that Ringworld’s Children opens with a glossary and a cast of characters, inclusions that even many Known Space fans will need. Newcomers to Niven’s artificial planet should start with Ringworld .

The sequel to “Ringworld”. Louis Wu, Speaker-to-Animals, and the Hindmost return to Ringworld. Their aim is to prevent cataclysm. In the process, they find themselves learning Ringworld’s incredible secrets.

The invasion of the lizard core systems has begun, with a wall of ships and defensive emplacements between Star Force and the heart of their enemy's empire. Let the battle begin. 'Ringworld' is the 80th episode in the Origin Series. Word Count: 30,500**

For decades, the spacefaring species of Known Space have battled over the largest artifact — and grandest prize — in the galaxy: the all-but-limitless resources and technology of the Ringworld. But without warning, the Ringworld has vanished, leaving behind three rival war fleets. Something must justify the blood and treasure that have been spent. If the fallen civilization of the Ringworld can no longer be despoiled of its secrets, the Puppeteers will be forced to surrender theirs. Everyone knows that the Puppeteers are cowards. But the crises converging upon the trillion Puppeteers of the Fleet of Worlds go far beyond even the onrushing armadas: Adventurer Louis Wu and the exiled Puppeteer known only as Hindmost, marooned together for more than a decade, escaped from the Ringworld before it disappeared. And throughout those years, as he studied Ringworld technology, Hindmost has plotted to reclaim his power ... Ol''t''ro, the Gw''oth ensemble mind — and the Fleet of Worlds'' unsuspected puppet master for a century — is deviously brilliant. And increasingly unbalanced ... Proteus, the artificial intelligence on which, in desperation, the Puppeteers rely to manage their defenses, is outgrowing its programming — and the supposed constraints on its initiative ... Sigmund Ausfaller, paranoid and disgraced hero of the lost human colony of New Terra, knows that something threatens his adopted home world — and that it must be stopped ... Achilles, the megalomaniac Puppeteer — twice banished, and twice rehabilitated — sees the Fleet of Worlds'' existential crisis as a new opportunity to reclaim supreme power. Whatever the risks ... One way or another, the fabled race of Puppeteers may have come to the end of their days.

In this sequel to “Ringworld” and “Ringworld Engineers,” the ring is still home to many alien species. The last Puppeteer is still manipulating those he can, and Louis Wu must meet even more new challenges and solve more technological problems in order for the hominid species to survive.

A new place is being built, a world of huge dimensions, encompassing millions of miles, stronger than any planet before it. There is gravity, and with high walls and its proximity to the sun, a livable new planet that is three million times the area of the Earth can be formed. We can start again!