Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Some gems, some errors, and some common sense.

Not a bad book on a topic with precious few people writing on it. Interesting anecdotal history and "facts". There are some errors, and it not only casts doubt on other information but makes me think that Hogshire wrote down all he "knew" about opium on one of his clean days! Not to knock the book entirely, as it has some neat stuff about growing and harvesting, although there it was scanty, too. If Hogshire had more carefully researched some of his "facts", his writing on this topic would make a great book.