Gas. Groceries. Rent. The stock market. As economic forces swirl all around, it can be tough to figure out what it all means for your life. For almost 20 years, the folks at the NPR podcast Planet Money have worked to demystify that world. And now they're bringing their signature style to the printed page. David Common speaks with Alex Mayyasi, a longtime contributor to the show, about making economics accessible, and his new book, Planet Money: A Guide to the Economic Forces That Shape Your Life.