Follett shipped over 550 books in 22 boxes; one box had only 5 books in it. These are copier paper-sized boxes, too. Since they ship them in Dewey Decimal order, they do not stack books or place books at right angles to each other to fit more books in a box. Then they stuff the rest of the space in the box with all of this, what I presume to be, recycled paper.
The only "good" thing I can see to this process is that most boxes do not weigh more than 40 lbs. each. I certainly can figure out "Dewey order" by myself if it'll save a few trees!