Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Once again-Extraordinary

Disch is truly a master. This may be his best work, better even than his better-known Camp Concentration. David Pringle was right when he selected this as one of the 100 best science fiction novels, and he was right again when he said it was Disch's masterpiece, a novel of the forgotten people, and a moving work. This one will keep on the edge of your seat, but that's not all. Ursula K. LeGuin said this about Camp Concentration but I think it is better applied to Disch's most acclaimed novel. "If you read it, you will be changed."