Hi there! I have been collecting and researching German notgeld (emergency money) for nearly 50 years and have amassed a wealth of knowledge about the subject. All of these notgeld related publications are designed to assist the notgeld collector. You will be able to identify some scarcer/rarer pieces that you may then be able to pick up cheap. A collector's knowledge is better than a banknote dealer's usually, so use that to your advantage! Happy collecting. My notgeld.com website has lots and lots of info about notgeld for the passionate collector! I hope you purchase and then enjoy these notgeld reference books.