This one is for the Mrs.
Found this cool book searching site via a link on The Instant Guru blog. Its called Book Finder and it does multiple site searches for new and used books. Can find some real cheap prices.
An interesting aside is it doesn’t use affiliate links, that means they don’t get a cut if you buy. Seems like lost revenue. But the creators are Berkley grads and probably don’t care about that capitalist stuff.