As a result of the AMI release of Crown I suspect there are a good number of folks out there that have no idea Avempartha exists. That's not likely to happen this time as each book has a sample of the next book inside, and as you can see, the volume is clearly noted on the spine.
It would also make a pretty good bookmark as well, don't you think?
And as you can see, the book will have a sizable weight, making it possible to dodge the slings and arrows of, "the book is too darn short!"
Twice the book for less money than the originals, not a bad deal.