The Boy in Striped Pajamas

I read The Boy in Striped Pajamas recently. It was written in the perspective of a nine-year-old boy, Bruno. The story takes place during World War II and Bruno's dad is a German officer in charge of the Jewish concentration camp. However, Bruno has no idea about what is going on and starts to talk to a Jewish boy by the gate every day. They share their stories, until one day, Bruno decides to crawl under the gate to see what his friend's "home" is like...