Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book is dangerous to the health of babies.

The American Academy of Pediatrics has issued an alert against the type of parenting recommended in this book. The author is not medically-trained. Pediatricians have observed many children reared in the fashion recommended by the author to have problems such as insufficient weight gain, dehydration, and difficulty thriving.Dr. William Sears' The Baby Book or Nighttime Parenting offers much more healthy sleep and parenting advice for babies and their families. He is a pediatrician, and the father of several children, and offers a balanced view to child rearing.