When we teach money, either in a personal finance or an economics class, we frequently give little time to the whys and hows - why we use money and how it has evolved to its current state. And we often ignore some of the interesting paradoxes that it engenders. This would appear to be a book (review courtesy of The Economist) that could provide some background for that type of discussion. I know, you're thinking, "it's not tested, so I don't have time." But if the diversion can get your students to think more deeply about what money really is, the understanding might have some positive spillovers.
If anyone is familiar with it, I would welcome comments.