The Islamic State is mostly discussed in terms of its threat to the safety and security of the world. But as a geopolitical entity, its leadership has to deal with mundane considerations such as operating a financial system. So how does it work? On this week's Odd Lots podcast, the first in a series on money, markets and crime, we speak with Graeme Wood, the author of a new book about ISIS, about the monetary system and how it fits into ISIS ideology. We also discuss how ISIS uses the internet to promote its ideology and to recruit.