At Winter's End in Mass Market Paperback format by Silverberg, Robert. Published by Grand Central Publishing in 1989. Available in Used - Acceptable condition.
Robert Silverberg is an American author, best known for writing science fiction. He is a multiple winner of both the Hugo and Nebula Awards.
Silverberg received a Nebula award in 1986 for his novella Sailing to Byzantium, which takes its name from Yeats' poem; a Hugo in 1990 for Enter a Soldier. Later: Enter Another; and in 2004 he was named a Grand Master by the Science Fiction Writers of America.
([Source][1])
[1]: http://en.wikipedia.org/wiki/Robert_Silverberg