Simple and Direct
Much like the tone of Code Talker, the writing style makes you feel as if you're in the same room chatting with Chester Nez. You wouldn't expect this kind of guy to be hyperbolic or speak in pompous metaphorical prose. Nope: this book, like Chester, is straight shooting.
The Code Talker's narrative style is pretty simple and direct. Chester doesn't use any big or fancy words (except for some complicated military terminology every now and again). He tells it like it is. We can see this simple and direct narrative style in the opening sentences of the book:
Nothing ever dried. My damp combat uniform chafed at the back of my neck. Water ran down my forehead into my eyes. (1.1)
The sentences are short and the words are simple. We don't have a hard time pinning down Chester's meaning.
This narrative style is not only easy to follow, but it also evokes Chester's Navajo culture. After all, Chester comes from a culture where stories are told orally (because the Navajo language isn't written). This means that stories are told in a simple, direct way—they have to be memorized in order to be passed down.
By using simple and direct language in Code Talker, Chester's narrative style echoes the oral story-telling style of his ancestors. In this way, the style is a good fit for the story—and for Chester's own identity as a Navajo—because it allows us not only to understand the story that he's telling, but also to understand something about the way stories are told in Navajo culture.