Ultimate Star Wars

Definitely a good one - this is basically an encyclopedia for anything on screen with Star Wars, though, there are bits of stuff from the novels mentioned too. Just do wish it was larger with more stuff in the entries, but then it would have been far too expensive, and this was a doable price that I got it for. The downside is of course since episode 9 isn't out yet, this will need to be updated yet again, but we don't have to worry about that for a little while anyway. :)