Brian Aldiss has called [Philip Dick] "one of the masters of present-day discontents", a thing readily apparent in much of his work. But one of the great fascinations his work holds for me is the effects achieved when he dumps these discontents into that special machine in his head and turns on the current. It is not simply that I consider it a form of aesthetic cheating to compare one writer with another, but I cannot think of another writer with whom to compare Philip Dick. Aldiss suggests [Luigi] Pirandello, which is not bad for the one small aspect of reality shuffling. But Pirandello's was basically a destructive machine. It was a triumph of technique over convention, possessed of but one basic message no matter what was fed into the chopper. Philip Dick's is a far more complicated program. His management of a story takes you from here...