Those of us who still carry coins or cash—and I notice that I do that less and less—carry around “a pocket guide to world history and culture.” Money, writes Frank Holt, provides us with a historical record “unrivaled by papyrus, paper and parchment. Coins are perhaps the most sucessful information technology ever devised.”

In his new book When Money Talks: A History of Coins and Numismatics, Holt briskly and whimsically explores the life of coins; the importance of coins; and how to decode the information that coins provide, as well as providing us with a history of the history of doing that. Frank Lee Holt is Professor of Classical History at the University of Houston, with research emphases on the subject matter of the forgotten peripheries of the classical world and on the methodology of cognitive numismatics—of which much more will be said in this conversation.