Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Searching for Yellowstone

This is a review of Yellowstone history from a system-wide and ecological perspective. It is well written and provides a great deal of factual information. It presents well thought out conclusions. It is balanced; not overly slanted toward the National Park Service, but not overly critical. The book is extremely well researched. The stories of historical characters and events add much to the book. The universe of Yellowstone experts hold several differing views on the proper wildlife numbers that should be allowed in Yellowstone. Schullery fits into the group that favors using historical stocking as a baseline. Those inclined to an agronomy baseline will question some of the conclusions drawn. One of the other reviewers called this book an "easy pre-read." I disagree; it is not difficult to read, but it does deserve study.