Sam Tracy began producing the zine Biker Pride in the early 1990s, and the project later broadened just enough to become the urban cycling-focused Multiplier. He is the author of Bicycle!: A Repair and Maintenance Manifesto (Speck) and How to Rock and Roll. Having toiled as a bicycle mechanic and messenger for more than a decade, Tracy is now taking a break from the industry to serve as the office manager for a nonprofit organization dedicated to ending homelessness. He lives in Roxbury, Massachusetts, with his wife, Kerri, and their intrepid cat, Kozmo.