What is the author's tone in the nonfiction book, Man-eaters of Kumaon?

Each story in the collection begins with a calm tone, often with a series of mundane observations and a straightforward explanation of the particular man-eater to be hunted down and shot. While Corbett occasionally has to give up, he is largely successful and as evidence builds Corbett gets closer and closer to killing his prey. Consequently, the tone builds gradually to an intense emotional frenzy, where Corbett is standing right behind or in front of an animal that could easily and instantly kill him; he then quickly describes his shots and how the animal eventually dies. Afterwards comes a calmer tone in the denouement and a sense of triumph pervades the text.

Finally, in some of his tangential observations the tone takes on a comedic cast, but these moments are loosely sprinkled throughout the text.