Okay, having just been looking at book themed wedding decorations (see post below), I've been thinking that this kind of tree based centre piece could go amazingly well with the book theme.
I think the main problem with this is that it would be very hard to prevent the centre pieces from being way too loud and over the top. I'm not sure if I would combine the drop-crystal idea with
strings of pearls hanging from the branches or choose between the two
and have so many flowers (or any flowers at all - however you might need the colour and femininity they offer). Hmm.
I definitely think, though, that with one or two books (
with the number cut out of a page) under a couple of branches (I would have them growing out of the cover of the top book) with a couple of blossoms stuck in the branches themselves and added 'fantasy' beads (crystal and/or pearl) could make a really sweet decoration. I could go on about how every bit of that is metaphoric for books and fantasy and my love of both, but I'm sure you can use your imagination.