At forty-three Jeff Winston is tired of his low-paid, unrewarding job, tired of the long silences at the breakfast table with his wife, saddened by the thought of no children to comfort his old age. But he hopes for better things, for happiness, maybe tomorrow ... But a sudden, fatal heart attack puts paid to that. Until Jeff wakes up in his eighteen-year-old body, all his memories of the next twenty-five years intact.

If he applies those memories, he can be rich in this new chance at life and can become one of the most powerful men in America. Until he dies at forty-three and wakes up in his eighteen-year-old body again ... and again in a continuous twenty-five year cycle each time starting from scratch at the age of eighteen to reclaim lost loves, make a fortune - or remedy past mistakes.

A novel of gripping adventure, romance, and fascinating speculation on the nature of time, Replay asks the question: "What if you could live your life over again?"

What would happen if the world were ending? A catastrophic event renders the earth a ticking time bomb. In a feverish race against the inevitable, nations around the globe band together to devise an ambitious plan to ensure the survival of humanity far beyond our atmosphere, in outer space.

But the complexities and unpredictability of human nature coupled with unforeseen challenges and dangers threaten the intrepid pioneers, until only a handful of survivors remain.

Five thousand years later, their progeny—seven distinct races now three billion strong—embark on yet another audacious journey into the unknown, to an alien world utterly transformed by cataclysm and time: Earth.

A writer of dazzling genius and imaginative vision, Neal Stephenson combines science, philosophy, technology, psychology, and literature in a magnificent work of speculative fiction that offers a portrait of a future that is both extraordinary and eerily recognizable. As he did in Anathem, Cryptonomicon, the Baroque Cycle, and Reamde, Stephenson explores some of our biggest ideas and perplexing challenges in a breathtaking saga that is daring, engrossing, and altogether brilliant.