Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Only good as a door stop

Except for alot of talks around the subject, this book does not contain any useful advice.For a person who know a thing or two about software development, I expected a kick start book to provice a useful step by step example of how to use Workshop to write application, instead this book tells you nothing, but general talk about the concept of workshop.Don't buy this book, it is a waste of money