What is the author's style in The Last Mission by Harry Mazer?

The language of the novel is simple English. The novel is written for young readers, therefore the grammar and sentence structure is simple, but not so simple as to be distracting to an older reader. The novel includes many phrases in German, especially after Jack is taken as a prisoner of war, as well as a few phrases in Yiddish, the ancient language of Jews. These phrases are spoken by the Germans or are remembered phrases that Jack has heard his grandmother say. These phrases are often explained immediately within the text and therefore pose no obstacle to the comprehension of the novel.