About 5 years ago, I stumbled across an ebook about money, which I saved on my harddrive as a pdf, but cannot find it anymore. It is likely lost. Unfortunately, I don't remember the title at all, nor the author. The book explained very nicely how money works and what role it plays in the economy. The part that stood out for me was a description of a money system, where interest was eliminated, and money lost its value over time if it did not change hands. I wonder if some of you know which book I am talking about and can give me a pointer to find it again. Thanks a lot!