More in the line of catablog hacks --
Here's a URL to search for new knitting books at the AADL. If you inspect it carefully you'll see that it'd be easy to change for any subject you want. Note that a lot of the just-arrived books are already on reserve from a few people, so the best approach to this is to find the ones you want to see, put them on reserve, and then keep that pattern up until you start to always have books come in a la Netflix.
I haven't found an RSS feed for that equivalent search yet, though I know it's bound to be on the way; when it comes, I'll update this page and feed in the list of items, and set up a Feedburner link for it.