Instruct: Classify an Amazon review as either positive or negative.
Query: Great

Richard F. Spark is nothing more then a "maintenance manual" for the man, teaching him how to keep his sexual health and not suffer from all the different sexual problems that occur in the world. Great book to read on vacation, but without detail or substance, for this I reckoned "Natural Penis Enlargement: New Methods of Avoiding and Curing Impotence, Premature Ejaculation, and Erectile Dysfunction Safely and Inexpensively. New ... No Pumps, No Pills and No Gadgets! Vol. 2" by Platinum Millennium, a book that I've read and found much more interesting and informative