Instruct: Classify a given review as either positive or negative.
Query: Save your money.

Talk about being disappointed! This book took a very superficial approach to some very basic concepts and the result is a book that might be useful if you are brand new to deploying servlet-based Web applications but useless if you want to learn about the nuts and bolts. I bought it to make sure that I'd know how to correctly configure Tomcat in a production environment but this book added very little to what I'd already learned from reading the documentation.