This post - The Story of Oh - is another great one to read: http://pjmedia.com/richardfernandez/2012/07/16/the-story-of-...

Oh Kil-nam is a South Korean man who received his PhD in Germany, decided to defect there with his wife and two children in 1986.

Read the story, is all I can say.

I'm almost finished with this book. GREAT read, I recommend it to anyone that wants to learn about North Korea.

Also, Escape from Camp 14 by Blaine Harden.