Boy In Stripped Pajamas

In the book, Boy In the Stripped Pajamas, ends in a tragic death of Bruno and his friend, Shmuel that is a prisoner in a concentration camp in search for his father. The two are killed by being put in a gas chamber. This ending didn't suprise me because during this time it was hard and an unspeakable time for people who were in these camps and it's the truth of what actually happened so I was expecting this outcome.