Instruct: Classify a given Amazon review as either positive or negative.
Query: An Excellent Work!

As an amateur historian, I have set out to read a biography of each U.S. President. Harry Ammon's book was among the best that I read. Ammon presents history as a great story, filled with larger than life characters. The book clearly explains the politics of the day and gives the reader a definite understanding of the often overlooked President Monroe. This book is a triumph and an unexpected page-turner.