what's up with the weird division of letters too. why do o, p, q, and r, s, t, have their own lines.
would've looked much nicer without that awkward block of white (red?) space there.
I suspect that space is for pinning up a poster, perhaps showing a picture of the spines of all the books that could've fitted there, had there been regular shelves, in a sort of trompe l'oeil stylee?