Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
My son loves these books he is in 2nd grade. I don't even mind reading them to him some nights, they have very cute story lines! With just enough action to keep them interested, but not so much it keeps them up at night.
This series is my kids absolute favorite! Ages 7 & 8 we have been reading this series since it came out. We have pre ordered all we can and are always waiting for the new ones to be released. My son and daughter both really love this series. 1st and 2nd graders and kindergarteners love this series.