I found this book the other day with an unconventional cover.
poster dust jacket made of luxuriously thick paper.
This is a lovely book, but one thing I noticed about the binding was the distance between stitches. I've circled them in the photo below and you can see that the bottom stitch is significantly farther from the edge of the paper than the top stitch.
An interesting design feature of this book is the location of the barcode. This would usually be located on the outside of the back cover, but in this book it is located inside the back cover, presumably to avoid taking up space on the dust jacket poster.
And yet another interesting design choice is the mixture of paper stocks used in the book. You can see the marked colour variation between the two different paper stocks in the photo below.