|This article is about 'the Story Library book'. You may be looking for 'the engine'.|
Whiff is the fifty-third book in the My Thomas Story Library series.
Emily is looking forward to working with the new engine on Sodor, until she finds out that he is very grubby. But soon after a series of chases and teamwork, Emily and Whiff become great friends.
- In the original version, Diesel is illustrated with yellow and black stripes on his front.