What is the author's style in Johnny Got His Gun by Dalton Trumbo?

The novel is told in Standard American English in the flavor of the World War I era. It has the air and bravado of a sensitive twenty-something year old—until that twenty-something year old panics at the prospect of lying in darkness and silence for the rest of his life, kept alive by a respirator, and unable to communicate with the outside world. In these passages, which intersperse with lyrical descriptions of life growing up in Colorado and transition without warning, protagonist Joe Bonham cries out in horror and fear in staccato passages without punctuation, sometimes without word breaks. Several times Trumbo most effectively strings together snippets of songs, orations, prayers, biblical and literary passages, and conversations to create a sense of the hurly-burly of going to and being in war.