Acoustic solutions?

Libraries need to be quiet places.  These rooms will reflect a lot of sound.

There's ways to create narrow channels in the base or less conspicuous parts of the pieces, covered by textured,  slotted or perforated panels - you can see a wall-sized example here:

A ceiling treatment:

http://www.vercongroup.com.au/img/gallery/pren/large/_MG_1071.jpg

A rounded wall surface:
http://www.far-audio.com/images/rounded_slats.jpg

Source for the prior, with more examples:
http://www.far-audio.com/acoustic_panels.php


Commercially available wall panels are also an option...

http://www.xlprosystems.com/catalog/product_info.php?products_id=95

They can get pretty out there and involved - this is a veneer membrane over an acoustic foam core - nothing that we could do, but interesting to look at:
http://www.metropolismag.com/webimages/923/Ply5_t346.jpg

Here's just something awesome looking - taking on the idea of topology and slices / layers to create a structure, and is all about sound  -

http://mydesignfix.com/2009/12/14/mafoombey-acoustic-space-martti-kalliala-esa-ruskeep/