Christopher Awdry continued the Railway Series created by his father, Rev. W. Awdry, adding new stories about Thomas, Percy and the other engines of Sodor. Really Useful Engines begins his contribution to the original numbered series, followed by further volumes that introduce additional railway incidents, characters and changing technology while retaining the concise story format and railway detail established earlier. His books are aimed at young children but take locomotives, signalling and railway work seriously, giving the stories a practical mechanical grounding beneath the anthropomorphic characters. The most useful discovery routes are classic children's transport stories, train books and Thomas & Friends reading. Readers following the original Railway Series in order should encounter Christopher Awdry's volumes after the books written by his father. Read more Less