Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Outstanding work - thoughtful, well researched, compelling.

Coming on the heals of the CO high school shooting tragedy, Diaz's book is even clearer and more compelling. This author, who has a wealth of experience in understanding the root causes of violence, hits the nail on the head in this excellent book.It is depressing, however, to read the numerous negative reviews posted for this book which are clearly written by gun fanatics and gun store owners and by those who haven't taken the time to read this book. Gun violence is clearly on the rise in America and the number of Americans killed annually by guns will soon surpass the tens of thousands killed in auto accidents.