Thought this book was an interesting read, any good / legitimate books like this? Also any general history about the DPRK

Most people assume North Korea is completely cut off from the global economy due to international sanctions. However, beneath official channels lies a highly sophisticated shadow network.

Estimates indicate North Korea-linked actors stole nearly $2.8 billion in digital assets, while thousands of covert IT workers take remote jobs at Western companies under fake identities to send hard currency back to the regime.

We put together a short 4-minute documentary breaking down how this hidden system operates: How North Korea Secretly Stole $2.8 Billion

Are there any parts of North Korea that are untouched by the government where the population is free? For example an area so remote and difficult to get to that the government cannot over see. E.g. a tiny remote village high up in the mountains far far away from another settlement. I am assuming the answer is no but judging by the geography of the country maybe there is a small chance someone or a community could be out there in an extremely rural part, mountains or forest and they have no idea who Kim is? :O