Digital technology is advancing all the time, and how we pay for things is getting high tech, too. Instead of paper money and coins, or even credit and debit cards, this book introduces Bitcoins, a currency made up of bits and bytes. Readers will learn the essentials about Bitcoins, the sometimes-turbulent history of this open source currency, as well as examples of how it is used and when it has the most practical value. This intriguing resource reviews some of Bitcoins' pros and cons and discusses the future of this fascinating financial tool.