An engaging introduction to the attractions of collecting paper money, which in the last decade has become one of the major hobbies. For those attracted to the artistic side of the hobby, a collection of banknotes can form a miniature art gallery featuring the talents of the best artists and engravers in the world. For those interested in research, the field is wide open and new discoveries are being made all the time. From its beginnings in China, when the "mulberry bark flying money" was created to avoid transporting heavy coinage, paper money has provided a window onto the history of the...