Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointed

Sadly, there is not much that is new or uniquely informative in this book. It summarizes "baby sleep" method history, promising a new method, but fails to really provide a succinct plan. If I'm purchasing a sleep plan book, I don't need to hear if singing is good for my baby or that I need to talk in different tones and accents to my baby...I need a plan as the author describes in the title!