Robert Silverberg

Roma Eterna is a 2003 novel by Robert Silverberg which presents an alternative history in which the Roman Empire survives to the present day.

Up the Line is a time travel novel by American science fiction author Robert Silverberg. The plot revolves mainly around the paradoxes brought about by time travel, though it is also notable for its liberal dosage of sex and humor. It was nominated for a Nebula Award for Best Novel in 1969, and a Hugo Award for Best …