Robert Silverberg is a writer who constantly amazes me. Since the mid-1960s he has produced an incredible body of work. The quote on so many of his book covers ("Where Silverberg goes today, the rest of science fiction will go tomorrow!" –Isaac Asimov) is a simple observation based on repeated forays against the edges of the genre. He's won piles of awards, and if he hasn't hit the bestseller lists very often, it's not from lack of quality in his work.