Audiobook searching

A little glitch in catalog searching that Brian detected. In Advanced Search, you cannot use the format type limit to pull up only audiobooks. I checked with Terry B. and Mary Jane and the problem is connected to the way in which they are coded for circulation and may not be easily fixable. Using audiobooks as a keyword works pretty well - although it does turn up a handful of books that are about audiobooks. Luckily, it is not a search type we need often, although there are a lot of audiobooks on order, so that collection will be growing.