This is the 'B&O Power In Color Volume 2: Switchers, RDC's, First-Generation Roadswitchers' model railroading book from Morning Sun Books. Continuing his series on B&O diesels, author Bob Withers includes in his second volume switchers built by General Electric, Alco, Baldwin, Lima-Hamilton, the Electro Motive Corporation and Electro Motive Division of General Motors, and Fairbanks Morse; and Budd's Rail Diesel Cars. He reveals that Alco, Ingersoll-Rand and General Electric combined their efforts to produce B&O's first diesel locomotive, which is on display now at the National Museum of Transport in St. Louis, in December 1925.