N-Space (short story collection)

N-Space is a collection of science fiction short stories by American author Larry Niven, published in 1990. The stories within the collection explore various themes and concepts prevalent in Niven's larger Known Space universe, though not all are explicitly set within that established continuity.

The collection includes both original stories written specifically for the volume and previously published works, spanning a considerable portion of Niven's writing career up to that point. A common thread running through many of the stories is an exploration of different forms of space, alternate realities, and the bending or breaking of physical laws. The title, "N-Space," refers to a hypothetical space with more than the three spatial dimensions humans typically perceive, suggesting the potential for unexpected and often dangerous phenomena.

Notable stories within N-Space often feature Niven's characteristic hard science fiction approach, with rigorous attention to scientific plausibility (albeit sometimes extrapolated far beyond current scientific understanding) and logical consequences. The collection serves as a diverse sampler of Niven's short fiction, showcasing his ability to create engaging narratives centered around innovative scientific ideas. It is considered a valuable entry point for readers unfamiliar with Niven's work, and a worthwhile compilation for existing fans.