Robert Silverberg (born January 15, 1935) is an American author, best known for writing science fiction. He is a multiple nominee of the Hugo Award and a winner of the Nebula Award.
In 1969 Nightwings was awarded the Hugo for best novella. Silverberg won a Nebula award in 1970 for the short story Passengers, two the following year for his novel A Time of Changes and the short story Good News from the Vatican, and yet another in 1975 for his novella Born with the Dead.
Source: Wikipedia, "Robert Silverberg", available under the CC-BY-SA License.