The American book Who Moved My Cheese? has been a best-seller all over the world. Its author is Spence Johnson. It teaches people how to face changes in their lives. It is just for teens. The book tells us that when facing changes in our lives， like a new school or new friends, don't be afraid. Instead, use this change to make a better life. The book gives an example of a change at school. A school is changing from having two terms to three terms because there are too many students.
Several teens are talking about this. Most of them are unhappy and worried. But Chris is not. He laughs and tells a story about two mice, two “little people” and some cheese.
The four are in a maze(迷宫) looking for the cheese. Here, cheese means something important in life, like moving to a new class or getting into college. But they find the cheese is gone. The mice realise that they can't change what has happened and have to find more cheese. This means finding different dreams. The "little people", however, can't do this. They are afraid of change, so they find no cheese.
After Chris finishes the story, the friends understand one thing: to get more cheese, move in a new direction quickly. His friends understand how this can be used in the changes all teens face, such as doing well at school or having good relationships or just feeling good about yourself.
