Instruct: Classify the given review into positive or negative sentiment.
Query: Pretty good

The first half of the book or so is dedicated to the biology, chemistry, and earth sciences that were working to shape the world and it's occupants. Familiar territory but well done. Then the book moves into a more detailed discussion of evolution, especially of mammals. This part can be a little dense at times (for the non-Biologist at least). Lastly, there's kind of a strange digression into linguistics, animal intelligence, and ethics.The author writes well and was amusing at times. TTBH started out really interesting but the author seemed to lose focus as he went along. By the end, I was just glad the book was out of pages. Still, overall, it was a good book.Recommended.