For over 30 years, since my freshman year at UCLA, I have been an avid recreational and utility cyclist and "gear-headed" bicycle collector, tinkerer, and restorer. Since I always enjoyed Frank Berto's technical articles and insights on the design and operation of bicycle transmissions, I eagerly awaited publication of "The Dancing Chain." I was not disappointed! This well-illustrated and well-researched tome is the only comprehensive reference I have ever seen on the history of bicycle transmissions. It is a great read for any bicycle fan with an interest in history or technological evolution. My only nit-picking gripe is that the organization of the chapters sometimes makes it a little difficult to follow the chronology of a specific product line or manufacturer, although the material is all in there. I share Berto's appreciation of SunTour's innovative slant planograph rear derailleur design, which has since been almost universally copied by the competition.