Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Waste of Time

I bought this book after a particularly difficult morning with my three and five year old children. This book gave no insight into children this age fight so much and no tips for how to deal with the constant bickering. This book is just one person's opinion which appears to be based neither on expertise nor research. Overall, the author has few helpful tips and shows a very shallow understanding of sibling relationships.