What is the author's style in The Wednesday Wars by Gary D. Schmidt?

The novel is written in a language that is extremely informal. As the sentences are those of a seventh grade boy, the sentence construction follows the speech pattern of a teen. The sentences are not grammatically correct, but are easy to understand. This language is useful, in that it helps to show the the world of Holling though his eyes. The story is more believable because it is told in a manner a teenager would tell. The language of the novel does change when others are speaking, which helps to discern between characters. Mrs. Baker, a teacher, speaks more formally and grammatically correct, so it is clear to discern when she is speaking. Similarly, Holling's parents and other adults in the novel tend to speak properly, showing their more advanced language experience.