Gus and Duncan are two well known Star Wars collectors. Last year they published one of the most comprehensive Price Guides on collecting Star Wars and this year they are following up with a new guide on Prototypes. The books covers all the various prototype items including: packaging, toys, coins, etc. This is the first time that a book like this has been published and it looks like it will be worth every penny. It is already available for Pre Order and will ship in August. They’ve also said that they will have copies available at Celebration V and that is where I plan to get mine and hopefully signed like many of my other collecting books. Here is a sample page and a video flip through that Gus recently posted and it looks like there is going to be a decent section of the book covering coins.