Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Delany Loses It

It was with this book that Delany systematically began to dash the hopes of fans who had breathlessly awaited every new book up through "Nova". The writing skill is still there, no question. But Delany's pornographical and intellectual self-indulgence begin their corrosive process on his work. How sad. All that imagination and storytelling skill undermined by meaningless (and often tasteless) philosophical and sexual noodlings. In a parallel universe, Delany kept writing appealing and entertaining books in the vein of his early science fiction. Too bad we don't live in that universe.