"Increasingly visible theme in his works was the concern over dangers inherent in attempts to control the human society." I'm unclear what this sentence means. Since he's not writing, how can there be an "increasingly visible" theme?
The "Awards" section could have the prose tightened but it's not enough to quarrel over in a GA review.
The article relies very heavily on a singular source. This may cause problems later on but, from the looks of it, it seems to be rather comprehensive. Maybe work on getting more sources, perhaps off-line.
@Wugapodes: For GA+ levels, I agree we should try to expand it; but frankly I was not able to locate better sources (if I could, I'd have added them to Further Reading). There is some material in introductions and such, written to his novels by other writers, particularly in the editions after his death. --Piotr Konieczny aka Prokonsul Piotrus| reply here05:29, 7 August 2015 (UTC)Reply
Listed after the changes made. I would suggest trying to find some of those introductions and maybe incorporate them into the article to make it more comprehensive, especially if you're going for FA. Keep up the good work! Wugapodes (talk) 15:03, 7 August 2015 (UTC)Reply