What is the author's tone in Fast Food Nation by Eric Schlosser?

The entire tone of the book is actually mild, considering the subject matter and the obvious negative content. Schlosser is not ranting and raving, and is not filling his work with words of strong condemnation of the fast food industry and its supporting agri-business corporations. Rather, he is relying on calm, reasoned factual data and interviews, telling the story through the eyes of those living within the industry itself and citing statistical data which cannot be ignored or denied.