Volume 1 in this excellent series focuses on the Southern Pacific's wide range of Fairbanks-Morse diesel locomotives. The author explains why the SP first broke with EMD to purchase the Fairbanks-Morse Train Masters and then covers road switchers, the use of Train Masters outside and inside California, and the renumbering of both the switchers and the Train Masters. Illustrated throughout with black and white photos and schematic diagrams. Scarce.