Instruct: Classify a review into positive or negative sentiment.
Query: Excellent for identification, but not for general information

The book does have an introduction talking about the broad classifications of types of oaks, history of oak usage, historic management of oak forests, etc. But this introduction is short, and then the book gets into the nitty-gritty of identification. Not just red vs. white, but every single documented variant the author found in his extensive research. For all but one of these oaks, the author visited and examined a live specimen himself.