Beyond the Fall of Night

From the back cover Ace paperback May 1991:

Arthur C. Clarke's brilliant novella, *Against the Fall of Night*, takes us billions of years into the future. A young man named Alvin rebels against the machine-fed ease of his existence, discovers the long-hidden truth about human history, and forces his people to face their destiny among the stars. This is his story, expanded and continued by the award-winning Gregory Benford. A breathtaking journey into new and startling realms of possibility...