Horrors of the North Korean gulags by eyewitnesses

This e-book is a compilation of the eyewitness accounts of five individuals who lived or worked in North Korean gulags.
Two of the individuals are former prison guards and the other three were prisoners.
It was compiled by the International Group of Human Rights Volunteers

I will say up front that it is not easy to read as the accounts of cruelty in these prisons is hard to believe. hence the title of the book, "are they telling the truth?"

http://www.northkoreanrefugees.com/nk-truth.pdf

Here are three of the eyewitnesses that I was able to find online.

Sun ok-Lee former prisoner of Kaechon political prison camp. partially crippled from her six years in the camp. she wrote the book, "eyes of the tailless beasts"

Kang Chul Hwan wrote the book, "the aquariums of Pyongyang" it is his account of his 10 years in Yodok prison camp. 

Myung Chul-Ahn former prison guard at several gulags.

And here are some snippets of the book to give you some idea of what to expect if you read it.

The drawings were either done by the witnesses themselves or with the assistance of artists.

Also, here is an online slideshow with more information.

https://www.slideshare.net/ImsukHa?utm_campaign=profiletracking&utm_medium=sssite&utm_source=ssslideview


came across this as well. some content very graphic

https://humanexperimentations.weebly.com/north-korea.html