What is the author's tone in No Man Knows My History: The Life of Joseph Smith by Fawn M. Brodie?

From the preface, Ms. Brodie makes it clear that her purpose is to discredit Joseph as a Prophet of God, along with the millions of members of the church that he founded. Every chapter is filled with slander, negativism, and bits of truth interwoven to make her version of history seem to be truth.