What is the author's tone in Fall of the Roman Republic by Plutarch?

While the book is actually written in a fairly straightforward manner, some readers may have trouble keeping up. The places and people are often mentioned with no explanation as to that person's identity or the location of the place. Also, supernatural things are often told as stark fact. For example, one of Sulla's generals—Marcus Lucullus—is debating whether to take his troops into a particular battle because his men are not amply armed.