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Review title: The magic indeed went away
Product review: There's a short story by Niven called "Not Long Before the End", to which this book is a kind of a sequel and which, I think, won a Hugo. I guess Niven thought his idea was just too good to squander on a single short story. Possibly: but it was a good short story, and this is a flabby book. A collection of short stories might have been preferable.
