Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too one sided. Scares parents. Read Sears book.

I wouldn't recommend this. The book by Sears is the best, and I gave that one 5 starts and 100% recommend it. This book will scare any parent out of even considering giving their children any vaccines, and isn't that just as bad as blindly agreeing without knowing more? In order to make an informed decision, whatever decision a parent makes, one needs to know both sides of the argument, not be frightened into making one choice or another. Reading the Sears book gave me the opportunity to make my decisions (you have many decisions to make and many options to choose from) knowing both the sides of the vaccine arguement and feel confident about what I've decided.