Cronos

by Robert Silverberg

From the man who has won more Hugo and Nebula awards than any other author in the history of fantastic literature - three complete novels that embody the concept of time travel.LETTERS TO ATLANTIS: Time travel has allowed Roy's consciousness to enter the mind of the heir to Atlantis's throne, and what he found disturbed him. How could such an advanced city exist at this time? The rest of the world was, as Roy's partner, Lora, discovered in her travels, a dark, barbaric land still thawing from the ice age. Roy knew the island's fate -- according to legend, it would vanish into the sea. But if Roy was in an Atlantis unlike anything the researchers had predicted, then what were its secrets? And when would it be destroyed?PROJECT PENDULUM: The nature of time mechanics requires that the two travelers' masses be precisely matched; for that reason, the first time travelers must be a pair of identical twins. For paleontologist Sean Gabrielson, the chance to journey back to the age of dinosaurs