Economist David McWilliams charts the relationship between humans and money - from clay tablets in Mesopotamia to coins in Ancient Greece, from mathematics in the medieval Arab world to the French Revolution, and from the emergence of the US dollar right up to today's cryptocurrency. Along the way, we meet a host of characters who have innovated with money, disrupting society and transforming the way we live. Like humanity, money is ever changing, adapting to its time and circumstances.