This is a Morning Sun Books 1640 Southern Pacific: The Photography of SP Employee Bill Wolverton - Volume 1: Roseville and the Sacramento Valley 1971-1975 (Hardcover, 128 Pages). Former SP employee Bill Wolverton had the internal knowledge of where the vanishing F-units, Alcos, and other goodies were lurking and the photographic skills to record them in beautiful action sequences. Manufacturer: Morning Sun Books. Model Number: 1640. Category 1: Trains Books and Media. Category 2: RR History. Availability: Ships in 4 to 10 Business Days. Trainz Product Id: 12316394.