Fate of Worlds: Return from the Ringworld

Fate of Worlds is the fifth and final installment of Larry Niven and Edward M. Lerner's Fleet of Worlds series and to Niven's original Ringworld series.

For decades, the spacefaring species of Known Space have battled over the largest artifact—and grandest prize—in the galaxy: the all-but-limitless resources and technology of the Ringworld. But without warning the Ringworld has vanished, leaving behind three rival war fleets.

Someth…