Book excerpt: From Abbott-Detroit to Zip, this unique reference book documents American gasoline-powered automobiles manufactured for the model years 1906 through 1915, the Brass Era. In these explosive early years of automotive history, a vast number of manufacturers--most of which failed within two years--produced a range of cars whose sheer diversity is unmatched in later times. The short corporate lifespans and constant change throughout the industry left a fragmented historical record, with data about specific models scarce and scattered in later sources. Here the basic facts of 4,000+ cars, painstakingly researched in all available period sources, are collected and trends of the era are analyzed.