Instruct: Classify Amazon reviews into positive or negative sentiment
Query: great book

I used to eat every meal out. I bought a grill because it is getting so expensive to eat out. I bought this book to teach me how to use it. This book is great. It removes the guess work, for every question I've had the answer is there. One tip, buy the book before you buy the grill because it even covers what to look for in a grill.