Ringworld: Revenge of the Patriarch

"I thought about this from the beginning... there should be a third Ringworld book, but it should be on a computer. Revenge of the Patriarch is the sequel to the first two books... I'm glad it's as great as it is."

-Larry Niven

The infodisk said you were to deliver a warning...

It never mentioned an insane Patriarch, Kzinti assassins, Puppeteer genocide, or the fact that the only hope for the future of the universe might be found on a world so immense it could hold a million earths.

A tangled web of intrigue brings together a vengeful Kzin, a kidnapped engineer and a mercenary - alone against a plot which could plunge all of Known Space into total chaos. The Kzinti are on the warpath, the Puppeteers claim innocence, and Ringworld holds the answer - If only you can find it in time....

Source:

Unknown Source