Seventy-five years on, Electro-Motive E-Units and F-Units remain the most recognizable locomotives ever conceived. In this wonderfully illustrated history, author Brian Solomon explores the business and cultural climates of the 1930s that led to the development and introduction of these classics and shows how the locomotives set the tone for the railroad industry's transition from steam to diesel power. Across the decades and across the continent, Solomon follows the evolution and use of these locomotives, from the first E-Unit in 1937 to repurposed and restored examples still plying the rails today. Packed with rare period photos in both black and white and color, this is the ultimate celebration of the locomotives that set the standards for those that followed.