What is the author's style in It by Stephen King?

The language of the novel is simple English. The novel takes place in two decades, the fifties and the eighties. During the sections that take place in the fifties, the dialogue includes some slang that was prevalent during this time, giving the reader a better feel for the decade. The author does the same in the episodes that take place in the eighties, maturing the dialogue that is now spoken by adults and adding slang that was common to that period. The author also includes some vulgar language in the dialogue, using it to show emotion from his characters.