
Betrayer of Worlds is a science fiction novel by American writers Larry Niven and Edward M. Lerner, set in the Known Space series. It is a sequel to their previous novels Fleet of Worlds, Juggler of Worlds, and Destroyer of Worlds, and is set 70 years before Ringworld.

"The Borderland of Sol" is a science fiction novelette by American writer Larry Niven. It is the fifth in the Known Space series of stories about crashlander Beowulf Shaeffer.

Crashlander is a fix-up novel by American writer Larry Niven, published in 1994 (ISBN 978-0345381682) and set in his Known Space universe. It is also a term used in the Known Space universe, denoting a human born on the planet We Made It.

Death by Ecstasy is a science fiction novella by American writer Larry Niven, set in the Known Space universe. It is the first of five Gil Hamilton detective stories, and provides most of the backstory for the character. It first appeared in the January 1969 edition of Galaxy under the title The Organleggers.

Destroyer of Worlds is a science fiction novel by American writer Larry Niven and Edward M. Lerner, set in the Known Space series. It is a sequel to their previous novels, Fleet of Worlds and Juggler of Worlds. It is set ten years after Juggler of Worlds, drawing heavily from Protector, but, like the rest of the series, can stand alone.

Fate of Worlds: Return From the Ringworld is a science fiction novel by American writers Larry Niven and Edward M. Lerner. It was first published in hardcover and ebook editions by Tor Books in August 2012, with paperback and trade paperback editions following from the same publisher in July 2013 and June 2014, respectively. It is the fifth and final book in the Fleet of Worlds series, itself a subset of Niven's Known Space series.

Flatlander (ISBN 0-345-39480-1) is a 1995 collection of stories by American writer Larry Niven, all set in Known Space. It is the definitive collection of all stories by Niven about ARM agent Gil Hamilton. Many of the stories revolve around the theme of involuntary organ transplantation.

Fleet of Worlds is a science fiction novel by American writers Larry Niven and Edward M. Lerner, part of Niven's Known Space series. The Fleet of Worlds (sub)series, consisting of this book and its four sequels, is named for its opening book.

A Gift From Earth is a science fiction novel by American writer Larry Niven, first published in 1968 and set in his Known Space universe. The novel was originally serialized as "Slowboat Cargo".

"The Handicapped" is a science fiction short story by Larry Niven, originally published in the December 1967 issue of Galaxy Science Fiction as "Handicap". Set in the Known Space universe, the story introduces the Grogs, the sessile but sentient inhabitants of the planet Down.

Inconstant Star is a science fiction fix-up novel by American writer Poul Anderson. It is formed by the novellas Iron and Inconstant Star, first published in The Man-Kzin Wars (1988) and Man-Kzin Wars III (1990), respectively. The title is from the tumbling alien artifact that sends out radiation. Due to the tumbling effect, the output can only be seen briefly from a given point in space, looking like a star, but then disappearing as the artifact moves.

Juggler of Worlds (2008) is a science fiction novel by American writers Larry Niven and Edward M. Lerner, a sequel to their Fleet of Worlds.

The Man-Kzin Wars is a series of military science fiction short story collections, as well as the eponymous conflicts between mankind and the Kzinti that they detail. They are set in Larry Niven's Known Space universe; however, Niven himself has only written a small number of the stories.

The Patchwork Girl is a science fiction novel by American writer Larry Niven. Part of his Known Space series, it is the fourth of five Gil Hamilton detective stories and the first to be published as a stand-alone novel in 1980. It was later included in the Gil Hamilton anthology Flatlander.

Protector is a 1973 science fiction novel by American writer Larry Niven, set in his Known Space universe. It was nominated for the Hugo in 1974, and placed fourth in the annual Locus poll for that year.

Ringworld is a 1970 science fiction novel by Larry Niven, set in his Known Space universe and considered a classic of science fiction literature. Ringworld tells the story of Louis Wu and his companions on a mission to the Ringworld, a rotating wheel space station, an alien construct in space 186 million miles in diameter. Niven later added three sequel novels and then cowrote, with Edward M. Lerner, four prequels and a final sequel; the five latter novels constitute the Fleet of Worlds series. All the Ringworld novels tie into numerous other books set in Known Space. Ringworld won the Nebula Award in 1970, as well as both the Hugo Award and Locus Award in 1971.

The Ringworld Engineers is a 1980 science fiction novel by American writer Larry Niven. It is the first sequel to Niven's Ringworld and was nominated for both the Hugo and Locus Awards in 1981.

The Ringworld Throne is a science fiction novel by American writer Larry Niven, first published in 1996. It is the direct sequel to his previous work The Ringworld Engineers (1980). He wrote it as a replacement after being unable to finish his contracted novel The Ghost Ships, the sequel to The Integral Trees and The Smoke Ring.

Ringworld: Revenge of the Patriarch is a 1993 video game by Tsunami Games for DOS. It's based on Larry Niven's Ringworld novel series. A sequel, Return to Ringworld, was released in 1994.

Ringworld's Children is a 2004 science fiction novel by American writer Larry Niven, the fourth in the Ringworld series set in the Known Space universe. It describes the continuing adventures of Louis Wu and companions on Ringworld.

"The Slaver Weapon" is the fourteenth episode of the first season of the American animated science fiction television series Star Trek: The Animated Series. It first aired on NBC on December 15, 1973, and was written by Larry Niven. It was based on his original short story "The Soft Weapon". This episode was expanded to become the first half of a full-length novel by science-fiction author Alan Dean Foster as Star Trek Log Ten.

"The Soft Weapon" is a science fiction short story by the American writer Larry Niven, set in his Known Space universe. It was first published in the February 1967 issue of If.

Tales of Known Space: The Universe of Larry Niven is a science fiction collection by Larry Niven, collecting thirteen short stories published between 1964 and 1975 along with several essays by Niven and a chronology. This book was collected in Three Books of Known Space.

World of Ptavvs is a science fiction novel by American writer Larry Niven, first published in 1966 and set in his Known Space universe. It was Niven's first published novel and is based on a 1965 magazine story of the same name.