Fate of Worlds: Return from the Ringworld

But the crises converging upon the trillion Puppeteers of the Fleet of Worlds go far beyond even the onrushing armadas:

Adventurer Louis Wu and the exiled Puppeteer known only as Hindmost, marooned together for more than a decade, escaped from the Ringworld before it disappeared. And throughout those years, as he studied Ringworld technology, Hindmost has plotted to reclaim his power ...

Ol't'ro, the Gw'oth ensemble mind—and the Fleet of World's unsuspected puppet master for a century—is deviously brilliant. And, increasingly unbalanced ...

Proteus, the artificial intelligence on which—in desperation—the Puppeteers rely to manage their defenses, is outgrowing its programming. And the supposed constraints on its initiative ...

Sigmund Ausfaller, paranoid and disgraced hero of the lost human colony of New Terra, knows that something threatens his adopted home world. And that it must be stopped ...

Achilles, the megalomaniac Puppeteer, twice banished—and twice rehabilitated—sees the Fleet of World's existential crisis as a new opportunity to reclaim supreme power. Whatever the risks ...

One way or another, the fabled race of Puppeteers may have come to the end of their days in this final installment to Larry Niven and Edward M. Lerner's Fleet of Worlds series.