Rev. W. Awdry 
Thomas and the Great Discovery (Thomas & Friends) [EPUB ebook] 

THOMAS AND ALL the other engines are working hard. At the end of a long day, Thomas discovers that the bridge that will bring him home has collapsed, so he decides to find a different route. He finds an old track that appears to have been unused for a long time. As the track is more and more overgrown, Thomas thinks he must be lost, until he pulls into a forgotten town that has been abandoned for 50 years.From the Hardcover edition.