|This article is about 'the Story Library book'. You may be looking for 'the engine'.|
Billy (later retitled Thomas and Billy) is the fifty-fifth book in the My Thomas Story Library series.
Thomas is to help Billy on his first day on the Island, but Billy accuses Thomas of being bossy. But Billy's silliness runs him into trouble and Thomas is luckily there to help out.
- Diesel is illustrated with a yellow and black front.
- In four illustrations, Billy's siderod is out of alignment.