The explosive finale to the Ringworld and the Fleet of Worlds 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. Now, without warning, the Ringworld has vanished, leaving behind three rival war fleets.

If the fallen civilization of the Ringworld can no longer be despoiled of its secrets, the puppeteers will be forced to surrender theirs - everyone knows that they are cowards. 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.

One way or another, the fabled puppeteer race may have come to the end of its days.

Larry Niven is the multiple Hugo and Nebula Award-winning author of the Ringworld series, as well as many other science fiction masterpieces. His Footfall, coauthored with Jerry Pournelle, was a New York Times best seller. He lives in Chatsworth, California.

Edward M. Lerner has degrees in physics and computer science, a background that kept him mostly out of trouble until he began writing science fiction full time. His books include Probe, Moonstruck, and the collection Creative Destruction. He lives in Virginia with his wife, Ruth.