What is the author's tone in The Virtue of Selfishness by Ayn Rand?

In The Virtue of Selfishness, Rand and Branden write in a completely subjective tone. The issues they address are all based on Rand's self-constructed theory of Objectivism. Rand's standpoint on every issue is that she is entirely correct in her assertions. She never relents in her writing by suggesting that she might be mistaken on certain issues or that a contradictory perspective might possess certain validity. Nor do she or Branden present their views as suggestions of ways to live but as the only ways to possibly live.