Instruct: Classify Amazon reviews into positive or negative sentiment
Query: USELESS ...

THIS REVIEW BOOK (THE 2003 ed.) IS A WASTE OF TIME AND MONEY, AND DEFINITELY AN OVER-RATED BOOK... ALSO THIS IS NOT A GOOD REVIEW FOR THE INTERNAL MEDICINE BOARD NOR USMLE STEP 2 CK. I RECOMMENDED HARRISON'S PRINCIPLES OF INTERNAL MEDICINE BOARD REVIEW, KAPLAN INTERNAL MEDICINE BOARD REVIEW ( BY CONRAD FISCHER ),AND MEDSTUDY INERNAL MEDICINE CORE CURRICULUM (WITH Q&A BOOKS)