Instruct: Classify Amazon reviews into positive or negative sentiment
Query: HELPFUL & ENTERTAINING TO READ

I THINK DR LUNG DID A GOOD JOB ON THIS BOOK JUST LIKE HE DID ON KNIGHTS OF DARKNESS. THIS IS A REAL GOOD BOOK FOR MANY REASONS.ITS ENTERTAINING SO YOU WONT GET BORED OF IT. DR.LUNG PROVIDES INFORMATION ABOUT MANY GREAT WARRIORS FROM THE PAST. IT HAS GOOD TECHNIQUES ON THE ART OF INVISIBILITY & ALSO PERIMETER PENETRATION. THIS BOOK ALSO HAS VERY GOOD DIAGRAMS WHICH I FOUND TO BE HELPFUL. THE PERSON THAT GAVE THIS BOOK THE BAD REVIEW IS A FOOL & DONT KNOW WHAT THERE TALKING ABOUT. I WOULD RECOMMEND THIS BOOK TO ALL MODERN DAY WARRIORS.