Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Hidden America

This book was written by Roland Wells Robbins about his career as a self-taught historical archaeologist "to help spur more interest, and to show more Americans the genuine excitement to be found in digging." He discussed his work on Thoreau's house site at Walden Pond, Jefferson's birthplace, the Saugus, Mass. Ironworks, the Philipse Manor on the Hudson River, the supposed landing of the Vikings in New Hampshire, and more. This is required reading for any student of American History to gain insight on how the past is lost and rediscovered through archaeology.