We are glad you asked! Our lesson's eclectic style borrows from the Charlotte Mason philosophy that children learn best from “living books.” (AKA, books written by one person who has/had a passion for the subject and writes in conversational or narrative style. In short, living books make the subject come alive!) Because of this, we incorporate at least three books into each unit. If you are trying to build your home library, know that we have only recommended books that we believe will add value to your child’s education today and also in the future. But while we hope these books will grow right along with your family, we understand that not everyone is in a position to buy each book. Instead of buying, try reserving your books from your local library as soon as you receive your newsletter so that you can have them in time for your lessons. (Many libraries will even order books they don't already own if you request them!) Many of the books are also available as e-books and can be borrowed from places like OpenLibrary.org. We also include links to YouTube read-aloud when available—we even have many of our own that you can view here.