Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The secret to why stories don't "click" is revealed

Take the time and funds to acquire this book. A fantastic read. Yes, it's intense, but necessary, I believe, if you're going to figure out why elements of your story die when, for the life of you, it seems unclear why. This book (coupled with "The Art of Dramatic Writing" by Lajos Egri, which is worth its weight in gold) will fill story-crafting holes that you may not have known existed. Two more books I personally recommend are "Writing Your Screenplay" and "Selling Your Screenplay," both written by Cynthia Whitcomb (a prolific screenwriter who I've had the great fortune to have as my teacher). In my opinion (and I've read practically everything out there), there are no better books out there on the craft than hers.