Sand. It's in buildings, windows, your cell phone. But there isn't enough in the world for everyone. And that's created a dangerous black market. Subscribe to Planet Money+ in <a href="https://podcasts.apple.com/podcast/290783428">Apple Podcasts</a> or at <a href="http://plus.npr.org/planetmoney">plus.npr.org/planetmoney</a> Learn more about sponsor message choices: <a href="https://podcastchoices.com/adchoices">podcastchoices.com/adchoices</a> <a href="https://www.npr.org/about-npr/179878450/privacy-policy">NPR Privacy Policy</a>

The E-Book Wars

Wanna see a trick? Give us any topic and we can tie it back to the economy. At Planet Money, we explore the forces that shape our lives and bring you along for the ride. Don't just understand the economy – understand the world.Wanna go deeper? Subscribe to Planet Money+ and get sponsor-free episodes of Planet Money, The Indicator, and Planet Money Summer School. Plus access to bonus content. It's a new way to support the show you love. Learn more at plus.npr.org/planetmoney