The 11th edition retails for $47.95. That's a lot, but it's worth it just for the pictures alone. There are also lots of great collecting tips. The book should be available through any of your local book stores or on the web.
Keep in mind that I can only give a rough idea of what an item might be worth. I'm no expert, but at least it's a starting point. It's best to check with books, clubs or people who deal in Coke collectibles for an accurate appraisal.
I get no gratuities for any web sites or businesses I mention nor am I affiliated with any of them. I just search the web to come up with cool stuff and pass along as much of an answer as I can. Many answers contain additional information or may be edited from the original email for web site posting. All names and addresses have been modified to protect the privacy of the senders. The majority of items pictured are, unfortunately, not a part of my collection.