Mir publications (in English and other languages) were very popular in many countries of the world where they were affordable and available. It was one of the best things to come out of the Soviet era. They were excellent across the board. It is fashionable nowadays to badmouth everything "Soviet" but their focus on educating the masses in Science & Technology was farsighted.
See my responses in this thread - https://news.ycombinator.com/item?id=21346272 where i am exhorting people to bring them back into print :-)
From the above same thread, link to the archive - https://archive.org/details/@mirtitles?&sort=-publicdate&pag...