If you're interested in scratchbuilt Star Wars models and can't wait for the book mentioned below, check out Lasse Henning's site. In it, he shows how he has built his own quality miniatures of Star Wars subjects without resorting to buying off-the-shelf kits. These model techniques are the same ones used by pro modellers in Hollywood and around the world. Lasse has lots of pictures to document his project and it's a gold mine of information.
The Model Shop with Lasse Henning