Excerpt from Without You, There Is No Us by Suki Kim, plus links to reviews, author biography & more

Never hint that there is something wrong with their country.

You will be able to use the Internet in your room, and the telephone and fax machine in President Kim's office if there is an emergency, but communication will be monitored. Be careful which sites you visit on the Internet, and when you write home, speak positively about what is going on and do not discuss politics.

No foreign magazines or books will be allowed into Pyongyang except those declared and preapproved; physical books are more of a problem than e-books since they could be passed around.

Be careful with your terminology: Great Leader, Dear Leader, Precious Leader. Those names have to be carefully used, or better yet, just stay away from discussing them at all. Be careful about how to handle images too. For example, Air Koryo offers in-flight magazines. You take one to your office and it has a picture of Kim Jong-il, and let's say you end up sitting on it by mistake. Then you are in big trouble, because the photo is like the person. It is the same with the portrait of Kim Il-sung on the pins every North Korean wears. These men are regarded as deities, at least officially. Make sure you do not throw away, fold, tear, or damage any visual representation of them. Do not point at such images either. It would be considered an act of disrespect and you would be punished.

If someone comes up and asks about politics, just answer "I don't know," or say, "Oh, is that so?" End of conversation.

Reunification is a sensitive topic. Just stay away from it. • Do not say Bukhan (North Korea) or Namhan (South Korea). Chosun (the name for the last Korean kingdom) is what North Korea calls itself.

Do not speak Korean and always use English. Remember, many people around you will know English and understand what you are saying, so be careful what you say.

Do not get into long conversations with the guards or minders.

Do not make comparisons. For example, do not say their food is different from yours because that could be construed as critical.

Eating with locals on outings is prohibited.

Be careful with gifts. You must not give one thing to one person; you have to give it to everyone. Otherwise, it could be considered a bribe.

Living in Pyongyang is like living in a fishbowl. Everything you say and do will be watched. Even your dorm room might not be secure. They could go through your things. If you keep a journal and if you say something in it that is not complimentary, please do not leave it in your room. Even in your room, whatever you say could be recorded. Just get in a habit of not saying everything that is on your mind, not criticizing the government and things of that sort, so you won't slip.

When you come out of Pyongyang, avoid all interviews with press. Make sure you know whom you share things with afterward. Do not give press any information about PUST.

It was astonishing how quickly I would adapt to these rules, which seemed so absurd when I first wrote them down. Now, at 8 a.m., as I entered the classroom, I hoped I would remember to avoid all the forbidden topics. I took a deep breath and found myself standing in front of twenty-six young men, all of them neatly dressed and sitting up very straight.

Even now, writing in Manhattan, my heart beats faster recalling that initial meeting. Oddly enough, the first word that came to my mind was beauty. Something about that first moment in the classroom felt so clean and serene, and it was as though everything went silent, and there I was stepping onto a field of white, untrodden snow. They were young, and I remember them as beautiful, although on this point I cannot be certain as I soon began to delight in looking at them like they were my children, and can no longer recall a time when I didn't.

Excerpted from Without You, There Is No Us by Suki Kim. Copyright © 2014 by Suki Kim. Excerpted by permission of Crown. All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.