The fourth and final volume of posts from the Rust Age of ribbonfarm.com (2007-2012). In this collection of posts, Venkatesh Rao gamely tackles the mysteries of money, the business world, and the economy. While this volume will not make you rich quick (or slow), supply startup success recipes, or provide guidance on improving margins or setting interest rates, it should be of interest to anyone whose finance and economics curiosities extend beyond the mere making of money to the broader social realities it undergirds. Starting with a core set of essays on metaphors and mental models for money, the volume moves farther afield to the business world, startup culture, and consumer psychology, and ultimately to questions of life beyond the long, legibilizing reach of money.