Robert Silverberg has been nominated for, and won, more awards for his fiction than any other writer in the SF genre. This classic, now finally back in print, sweeps us -- and Clay, the main character -- into Earth's far-away future on a panoramic, billion-year journey. "Wildly generous with image and sensation and with sexuality."--"The New York Times." "Silverberg is one of SF's eminences."--"Brian W. Aldiss." "A surreal allegory...it remains my personal favorite and I recommend it wholeheartedly."--"Brian Stableford "