The Visual Dictionary of Star Wars, Episodes IV, V, & VI: The Ultimate Guide to Star Wars Characters and Creatures[Hardcover]
This book written by David West Reynolds is the ultimate dictionary for the Star Wars characters and creatures. The book has plenty of pictures and great details of actual props and characters from the movies. A very good book indeed at the listed price of $13.50 at Amazon.
Publishers Weekly states "The Visual Dictionary spotlights each of the characters by turn, from the big three (Luke Skywalker, Princess Leia and Han Solo) to the next tier, including Obi-Wan Kenobi, Darth Vader, Chewbacca, C-3P0 and R2-D2, as well as a vast supporting cast. Sidebars provide "back-stories" on many of the characters (Han Solo, for instance, was raised by space gypsies), and a close examination of clothing, weapons (including a cutaway view of Darth Vader's lightsaber) and equipment provides the answers to such questions as what does a Wookiee carry in his pouch"
Here is an example from the book: