Here is how the books would look UV'ed. These are just the first two and they were modified:
See, the original books didn't have that almost separated spine indent, but I added it, because the smoothing didn't look right on the cube. It was faaaaar to sharp. The lettering was almost what with specularity and one side was completely black and that just does not fly, so here's how the old and new books compare:
Left: New book. Right: Old Cube book
It's interesting and worth mentioning that in copying (duplicating) a shape or object includes it's UV unwrap, so all you do is rename your UV, load the book's texture and the texture will fit perfectly:
Volume two was duplicated from Volume one and UV name changed.
Why all the effort to give the books individuality? Simple: it looks much better and will add a touch of realism to the image it wouldn't otherwise have.
Have a great day everyone!!
PS, the portrait is public domain, so it is perfectly legal.
Thank YOU!!!