The Ringworld Throne (Known Space Series)

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 …