Now, the books that I saw advertised was a seven-volume set called Empires of the Ancient World, only $19.95 if one joins the Society. By opting in, one agrees to purchase four more books (at full price) from the Society. This is an expensive proposition, considering the Folio books tend to cost between $40-$60 each. That's a big hit to the wallet!
But they're so pretty...
(As if I didn't already have mountains of books to read...)