Awesome books for parents who want to teach their kids about the principles of a free society that they won't learn in public school which is driven by a radical left agenda. Topics include free markets, competition, individual rights, the non-aggression principle, personal responsibility, protectionism, and a variety of other issues. I pulled my kids from public schools recently, and this is a perfect addition for homeschool families or to supplement what is omitted in a public school curriculum. My kids love these books. I'm sure we will read the entire series multiple times over the next couple years. Currently my kids are 6 and 8.