Question Of the Week

This will be the last Question of the Week until next year. In Friday's post I will announce the school who answered the most questions correctly. I have really enjoyed posting these questions and I hope you have enjoyed participating in the Question of the Week. 

So here is this week's question:

In which book does a man trade a pig for a bike?

Remember to use the complete title and author's name when answering the question. Also remember to identify your school in your comments.