Novel set in the Known Space Universe. Written by Larry Niven and Edward M. Lerner? and published in 2012. Sequel to Fleet of Worlds (2007), Juggler of Worlds (2008), Destroyer of Worlds (2009) and Betrayer of Worlds (2010).
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.
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