Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Please double-check before taking this book to heart

If you are interested in this book because you or someone you know has bipolar disorder, please read the book review at www.draga.org/store/bookreviews_newhope.html before buying it. DRAGA is Depression and Related Affective Disorders Ass'n, and is affiliated with Johns Hopkins University . . . I don't know enough about this area to say which is right, but DRAGA has reservations that are worth looking into before you rely on this book. I just wanted to point this out for interested readers.