What is the author's tone in Deviant: The Shocking True Story of Ed Gein, the Original Psycho by Harold Schechter?

The story is written in a straight-forward tone and style and is presented in chronological order with brief sections of foreshadowing. The majority of the words will be understood by anyone of average reading ability. The setting and the story are real though it's evident that the author has taken some journalistic liberties for the sake of producing an interesting story.