Money talks . . . about history! Shells. Coins. Paper bills. Credit cards. Bitcoins. People have used all kinds of objects to buy, sell, or trade. Aren t you curious: what "is "money? Developed with numismatic curators at the Smithsonian, this fascinating book looks at how people, money, and history intersect, right on up to what's current about currency. Penguin-Smithsonian nonfiction: where content meets cool!"