mail these books media mail. it takes a little longer to get to the person but is a lot cheaper to send. also don't use boxes to ship in. shipping goes by weight so the heavier it is the more you pay. use delivery confirmation to ensure the person gets the item. ask the post office the cheapest way to send it and they should tell you the same thing. hope this helps a little
i go to the family dollar and buy those clasp envelopes to ship in. i get like 10 of them for $1.00 and i can fit like 25 comics in them. they have small medium and large and great big ones. also they sell those padded envelopes. i use those also