Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Never again...

If those books, called self preparation kit, are supposed to prepare you to exam, without the need to attend to course, then this is plain rubbish. I know that I'm late for party, but If anyone of you still consider buying this book and still has chance to take 70-290 exam, then search for something better. This book doesn't cover GPO at all, doesn't even mention it, dosen't cover Certificates and many things that appears on exam and lack of this will really help you to fail. Hopefully there are other ways to prepare to that exam.