I also wanted to mention the Noon Universe, but I have to point out that two of the most famous books of the series(Трудно быть богом - Hard to Be a God[0]; Обитаемый остров - The Inhabited Island[1]), which are also my favorite books of the series, are also sort of set in a dystopian world. They had to sneak some dystopian worlds into the utopian universe to make it more interesting.