I will fully admit I know barely anything at all about DPRK, ESPECIALLY early DPRK. I read a lil theory every now and then and I realized I never read anything about Kim Il Sung or North Korea. So I wonder: what do you suggest I read? Any good documentaries? Did Kim Il Sung write any really good theory?
SovereignState also recommended the book (including its foreword) called Socialist Education in Korea from Peace Land and Bread which you can get a pdf of on their site: https://www.peacelandbread.com/books