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. Explorere 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 Ghould protector; Acolyte, the exiled son of Speaker-to-Animals, and Wembleth, a strange Ringworld native with a mysterious past. All must play a dangerous 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. At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.

Blending awe-inspiring science with nonstop action and fun, this is the perfect introduction for readers new to this "New York Times" bestselling series, and long-awaited by fans of Niven's Ringworld.

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 too many years. Seeking a challenge, and all too capable of handling it. Nessus: a trembling coward, a puppeteer with a built-in survival pattern of nonviolence. Except that this particular puppeteer is insane. Teela Brown: human; a wide-eyed youngster with no allegiances, no experience, no abilities. And all the luck in the world. Speaker-To-Animals: kzin; large, orange-furred, and carnivorous. And one of the most savage life-forms known in the galaxy. Why did these disparate individuals come together? How could they possibly function together? And where, in the name of anything sane, were they headed?

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

Ringworld's children originally published by Tor in 2004. Fleet of worlds originally published by Tor in 2007.

For decades, the spacefaring species of Known Space have battled over the largest artifactNand grandest prizeNin the galaxy: the all-but-limitless resources and technology of the Ringworld. Without warning the Ringworld has vanished, leaving behind three rival war fleets.

The Goliath Stone is a visionary tale from Larry Niven and Matthew Joseph Harrington. Doctor Toby Glyer has effected miracle cures with the use of nanotechnology. But Glyer's controversial nanites are more than just the latest technological advance, they are a new form of life-and they have more uses than just medical. Glyer's nanites also have the potential to make everyone on Earth rich from the wealth of asteroids. Twenty-five years ago, the Briareus mission took nanomachinery out to divert an Earth-crossing asteroid and bring it back to be mined, only to drop out of contact as soon as it reached its target. The project was shut down and the technology was forcibly suppressed. Now, a much, much larger asteroid is on a collision course with Earth-and the Briareus nanites may be responsible. While the government scrambles to find a solution, Glyer knows that their only hope of avoiding Armageddon lies in the nanites themselves. On the run, Glyer must track down his old partner, William Connors, and find a way to make contact with their wayward children. As every parent learns, when you produce a new thinking being, the plans it makes are not necessarily your plans. But with a two-hundred-gigaton asteroid that rivals the rock that felled the dinosaurs hurtling toward Earth, Glyer and Connors don't have time to argue. Will Glyer's nanites be Earth's salvation or destruction? At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.