$100.00
All six Dumbing of Age books ship together for a reduced price! They'll fit into two (2) Priority Mail flat rate padded envelopes, three books per.
For your folks ordering internationally, note that I am eating a large portion of the shipping costs! ($20 off Canada/Mexico, $20 everywhere else) Just to keep those down, because, like, expensive??? Consider it a, uh, "I bought six dang books from across the globe, we're cool" rebate.