Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I've liked them all, but I think this is the best one!

I'm a 31 year old mom. A friend told me about these books. Now that I've read all three, I'm eagerly awaiting the next ones! They are quite enjoyable. I even cried at the end of this last one. Yes, there are some gross things in the book, so in my opinion, I wouldn't let anyone younger than 10 read it. If possible, I think a parent should take the time to read it with their kid(s)- more fun that way!