The Lego Star Wars Visual Dictionary (DK 2009) is a giant compendium of lego Star Wars models (duh--kind of obvious from the title). In this book you can find your favorite characters, ships, droids, and tons of other stuff you never knew had become lego! (and probably never needed to know). All the podracers from Episode 1 became legos, there are more bounty hunters than I knew existed...and so much more. There's lots of Star Wars information, and, of course, lego information alongside each model pictured.
My brother and I have spent hours browsing through this books-it's one of our favorites! And each book comes with a minifigure--we got and Episode 4 Luke!