Ontario Northland Power in Color from Morning Sun Books traces the entire diesel roster of the ONR from first Alco S-2 switchers imported from the U.S. to the 2020s roster. The various rebuilding programs are documented, and the many paint schemes detailed. Also featured are F unit rebuilds into APU, APCU, TEE retrofits, and CAT retrofits a morphed GP9 into a GP38-2 and the 2023-2024 rebuilding of five used SD70M units. This all-color book is a must-read for anyone modeling the Ontario Northland in the diesel era as well as for anyone who is interested in the evolution of the diesel locomotive! Ontario Northland Power in Color is one of many Morning Sun titles loaded with information about Canadian railroads. Hardcover,pages.