He was a seminal author of science fiction in the 1950s, who after many years absence returned in 1971 to write best sellers in the field. (newscientist.com)
Its an interesting concept and a mainstay in science fiction novel of the past century. (goodereader.com)
But it was SO MUCH better than 90 % of anything else that it was the be all and end all of science fiction films for me and my friends. (aintitcool.com)