"Greenberg's Guide to American Flyer Prewar O Gauge" first edition by Stephen Kimball is a comprehensive book published in 1987 by Greenberg's Publishing Company. This hardcover book, with 176 pages, is a valuable resource for model railroading enthusiasts interested in American Flyer Prewar O Gauge trains. The author provides detailed information and insights to help collectors and hobbyists better understand and appreciate the history, design, and operation of these classic model trains.