[gutvol-d] Search by subject for ebooks?

Hey, would there be any way we could be able to create a system for searching by subject matter for books? I have a mind to create a CD of books about and by native american indians for a girl i really like and the search mechanism is just not robust enough, searching full text takes too much time either. Being able to enter a single term under subject should be able to bring up a whole list of books related to that subject matter. Like, searching for science fiction should bring up a list of books that ARE science fiction, not just books with the words "science fiction" in the title or in the text. Jared