Robert Silverberg has been a full-time professional writer since 1955. Among his many books are LORD VALENTINE'S CASTLE, DYING INSIDE, NIGHTWINGS, A TIME OF CHANGES, and THE BOOK OF SKULLS. He is a many-time winner of the Hugo and Nebula awards and in 2004 was named a Grand Master by the Science FIction Writers of America. He and his wife, who writes under the name of Karen Haber, live in the San Francisco area.