I am surprised that nobody's yet mentioned Willam Gibson. The best living science fiction writer, in my opinion. "Neuromancer" is the best science fiction book I've read in the past twenty or thirty years.
http://www.williamgibsonbooks.com/books/books.asp
Unfortunately it seems like each successive book isn't quite as good as the last one, but I still think he's superior to the old guys - Asimov, Heinlein, etc.
And let us not forget Phillip K. Dick! At least before he finally lost his mind completely, say, pre-Valis.
http://www.philipkdick.com/
Well, since Jack L. Chalker died last year the competition for "Best Living SF Writer" IS a little easier.
Hmm... You don't suppose Gibson had a hand in that...
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My all-time favorite science fiction story is on old one by A. C. Clarke, "City and the Stars"
My all-time favorite science fiction story is on old one by A. C. Clarke, "City and the Stars"
My all-time favorite science fiction story is on old one by A. C. Clarke, "City and the Stars"
My all-time favorite science fiction story is on old one by A. C. Clarke, "City and the Stars"
My all-time favorite science fiction story is on old one by A. C. Clarke, "City and the Stars"
My favorite science fiction story is an oldie by Arthur C. Clarke, "City and the Stars".
PJ Farmer is interesting too.
My all-time favorite science fiction story is by one of the old guys, Arthur C. Clarke, "The City and The Stars"