Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A must buy!

A must buy! If you are serious about self publishing or just want to write your book, Dan Poynter's Self-Publishing Manual is a step-by-step guide. Jam-packed with valuable information, you'll need a red pen, highlighter, page markers, or all three to make sure you capture each gem. You will use this as a reference for each stage of your writing project.