Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Useless!!!!

This book is completely useless. It only gives you key words to identify syndromes, pathologies, treatments, etc... but in the real test you don't get those key words that lead you to a quick answer, like in this book. One of the worst books and worst review books out there. DON'T BUY. Don't even bother to read into it, USELESS, USELESS, USELESS!!!