Instruct: Classify the given Amazon review as either positive or negative.
Query: PHR Exam Prep: Professional in Human Resources (Exam Cram)

"Cram" is the key word here. Buy the book if you have no time to prepare for the PHR and are making a last ditch effort to pass. This book is not very effective for learning the 6 key study sections needed to pass the PHR in and by itself. For those people who cannot afford SHRM preparation materials ($500+), perhaps this book can be better than no preparation at all. I seriously doubt I would have passed the PHR if I had relied on this material alone.