Book excerpt: The Chronicles of a Detroit Railfan series of books brings back to life the many fascinating railroads serving a great city in the last quarter of the 20th Century when they were still so very interesting and so many. This is Volume 8 of Chronicles of a Detroit Railfan and it is about the commuter trains that ran between Detroit and Pontiac, Michigan. They were operated by the Southeastern Michigan Transportation Authority (SEMTA) and ran on Grand Trunk Western Railroad's Holly Subdivision tracks. This suburban commuter train operation is extensively covered between 1975 and their end of operations in 1983 in both color and black and white photographs taken by the author.