Boyne doesn’t exactly use puns per se, but instead he uses similar words to convey Bruno’s naivety. In the book, Bruno just simply doesn’t think much of what everyone is actually saying. It is rather interesting to see something like this being used as it is not all that common, so Boyne deserves respect for using that type of literary device.
The usage of this form of pun is interesting because it truly shows how clueless Bruno is about what is going on right outside of his house. Boyne uses words such as Fury and Out-With to mask Furher and Auschwitz. Even through that entire year of talking with Shmuel nothing came up about what Shmuel was going through. This dark literary device advances the horror of not knowing what is going on right outside your window. By using a pun like this he creates a very nervous