Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Everyone who writes for the stage should get this book.

I've been telling everyone about Dana's amazing book.The biggest surprise for me was that it's very readable--even enjoyable. It's not only a reference book to turn to when you have a question. I've read it through twice and gone back to specific sections when I needed them.It's already saved me from making a couple of big mistakes, gotten me off my duff to take care of some business I'd let slip and given me direction in areas I never quite understood.Give it to a friend - student, novice, mid-career or even established playwright, lyricist, theater composer or book writer - for his or her birthday. It'll be the best present they'll get.