My mom gave my two kids these books. They're now 8 and 5 and do enjoy them! I like how they are teaching my kids basic economics that don't get taught in school anymore but which should be common sense. They are absolutely essential reads! Some of the subjects are a bit hard for them to understand still, like the one about the Federal Reserve (the Creature from Jekyll Island), but they do understand the effects. I would like if the stories were a little longer, but probably with the content they might be the right length. My 8yo likes longer stories in general, though; that's why this isn't a 5-star review.
I find it amazing that half of these reviews are positive, from parents whose kids actually read them, and the other half of the reviews are 1-star - and so obviously from trolls. These books are a wonderful find, and we can't wait to watch the TV show, too! Comes out Sept 12 I think.