Lem was one of the most popular science fiction authors of recent decades to write in a language other than English, and his works were translated from Polish into more than 40 other languages. His books have sold 27 million copies.This, in my opinion, does not quite capture the fact that he was a major literary figure. I am not disputing the label "Science Fiction," but the label "Satire" fits just as well. Afterthoughts: Wikipedia describes him as "ethnically Jewish." Here is a good review of Cyberiad.