Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Short and sweet

In light of the popularity of Mel Gibson's "Passion of the Christ," this is a good theological book with 2-page chapters that can be used as a backdrop showing the necessity of Christ's death (and resurrection). Using scripture left and right, Piper comes up with succinct points that clearly show how and why the horrible crucifixion was necessary. It can be utilized as a devotional, as it's difficult (read: tedious) to put six or seven of these chapters together. Piper made this book available to churches at an extremely low cost and is donating the proceeds, which is quite admirable as well. (In other words, he's not piggybacking on Gibson's movie all the way to the bank.) Overall, I like the read and am glad to recommend it.