With Michael Green, In Gold We Trust: The Future of Money in an Age of Uncertainty, Kindle Single. Here is a short video about the book.
From the authors:
It provides a lively analysis of the big economic questions currently facing America, such as the danger to the dollar posed by gridlock in DC, especially over deficit reduction, the euro crisis, the growing risk of inflation and the changing attitude of China towards America. We argue that the renaissance of gold, plus the development of virtual currencies such as Bitcoin, reflect weaknesses in the technology of money that we all need to take seriously and try to fix.