Instruct: Classify Amazon reviews into positive or negative sentiment
Query: There isn't very much technical substance.

I read this book cover to cover on a plane trip between San Francisco and Houston. How much substance could it have? Most of the book is devoted to installation and exploring.This is definitely not a designer's or developer's selection. When I would look up anything even slightly advanced, such as what a resource dispenser is (let alone how to write one), I would get nothing beyond cursory handwaving reference to the SDK.Read the SDK documentation instead!