Our son loves these books and I love that HE loves these books! Head over to Amazon.com here where you can score the Who Was? History Books starting at only $2.49 each!
Here are a few that I see right away:
Super saver shipping is free on orders over $35, a $25 book order or get free 2-day shipping on any size order with Amazon Prime. Get a free 30 day trial to Amazon Prime. Another option is to choose free no-rush shipping and get a $5.99 credit for Prime Pantry OR a $1 credit for eBooks & more, although this may vary by user so doublecheck at checkout.
(Thanks, Passionate Penny Pincher!)