Little Golden Book - Thomas and the Great Discovery

Thomas and all the other engines are working hard. At the end of a long day, Thomas discovers an old track that long ago fell into disuse. As the track becomes more and more overgrown, Thomas thinks he must be lost, until he pulls into a forgotten town that has been abandoned for fifty years. Thomas and a new Really Useful Engine named Stanley are asked to fix up the old town, but first they need to learn to cooperate.