Instruct: Classify the given review into positive or negative sentiment.
Query: very interesting

The mentally ill, women, gangs, racism -- just some of the topics covered in this book. This author doesn't waste words but every one packs a punch. Americans need to know what's happening here in our prisons. I had no idea but it's all here in black and white with footnotes. I recommend this book to anyone that cares about our country.