Collectorz (Score 1)

I used to run a shipboard library while I was in the Navy and used http://www.collectorz.com/book/ It is relatively inexpensive feature filled downloads cover art so patrons of the library can See what is in the library. I don't reccommend this for anything over about 1500 books but it sounds like your library may be smaller than that. I thiink you will be pleased with it.