The Ringworld is dying.

And this time even Louis Wu - captive of the hyper-intelligent alien Tunesmith - may be unable to save it. Even if Louis can escape he will then have to survive in a galaxy ravaged by interstellar war and deadly political intrigue. For the Ringworld is no longer a secret and entire civilisations now battle to control its power.

The victorious race that conquers the Ringworld will conquer the galaxy ... and no one will be able to stop them.

But Louis Wu is going to try.

Totally believable ... one is impressed most by Niven's universe and the way he exploits vast spaces, dizzying mathematics, and huge units of time and matter * THE OBSERVER *
Larry Niven has ideas the size of planets * TIME OUT *

Larry Niven has won the prestigious Hugo Award five times. He is known to millions as the premier modern author of rigorous, scientifically consistent hard SF, the champion of 'SF without a net'.