Very thankful for the work these authors are doing! While is history is barely being taught in the schools anymore, these books tackle subjects in a child-friendly and engaging way. We have all the Tuttle Twins books and my kids (boys 9 and 10) have picked them up and read them all on their own...that's how engaging they are! And they understand the concepts, concepts many of us weren't introduced to until high school. Topics covered include the golden rule, banking, inflation, bartering, entrepreneurship, thinking of ways to work together peacefully to avoid coercion, what incentivises us, free market, business regulations, economics and what happens when hard-working people quit. So many good topics! I bought the set after a few of my friends recommended them and I'm so glad I did. We also have the board books and older kids' books, but I haven't read them yet, so won't comment on them. (Unlike many of the trolls' comments you may see... I have read the books I review.) I am happy to support a business such as this!