He wrote 26 books in the series, which feature the adventures of a group of anthropomorphized trains and other railway vehicles on the fictional island of Sodor.
Here are some of his most popular titles:
* The Railway Series:
* The Three Railway Engines (1945)
* Thomas the Tank Engine (1946)
* James the Red Engine (1948)
* Gordon the Big Engine (1950)
* Henry the Green Engine (1951)
* Toby the Tram Engine (1952)
* Edward the Blue Engine (1953)
* Percy the Small Engine (1956)
* Donald and Douglas (1957)
* Oliver the Western Engine (1960)
* The Great Railway Show (1961)
* Stepney the "Bluebell" Engine (1963)
* Diesel (1965)
* Bill and Ben (1967)
* Bear (1969)
* Thomas and the Missing Christmas Tree (1972)
* Thomas and the Guardians of Sodor (1977)
* Thomas and the Twins (1980)
* Thomas and the Great Railway Show (1981)
Note: The "Railway Series" was continued by his son, the Reverend W. Awdry, after Christopher's death.
While Christopher Awdry mainly wrote the "Railway Series," he also contributed to other books and publications related to railways and trains.