Instruct: Classify Amazon reviews into positive or negative sentiment
Query: HIGHLY RECOMMENDED BY FORMER UNDERCOVER OFFICER

After reading this short,but comprehensive, book I realised that this is the closest thing I have read to what surveillance is all about. I have had many years experience in law enforcement and this book reflects how it actually is. The methods outlined in this book are still used by Police teams in the year 2000. Congratulations to Bob Bruno for a great manual. Only problem is that it is to short (84 pages)