Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very helpful

My son is working on his Eagle Scout project which is to clean and restore gravestones in a local graveyard dating back to the mid 1800s. This book helped us develop a scope of the project by suggesting an approach to mapping, surveying then cleaning/restoring/resetting the gravestones. We have found no other reference like it. Dense text, would have loved a few more photos, but all in all, a great reference for an unusual project.