Jessica Helfand is partner in Jessica Helfand/William Drenttel, a design consultancy. She has been collecting wheels for several years.
Steven Heller is senior Art Director for the New York Times & author of over seventy books on art, culture, & design. He lives in New York City.
Rick Poynor is founding editor of Eye, & writes frequently on design. He is the author of seven previous books, including Design Without Boundaries (1998). He lives in London.