Thomas and the Green Controller (book)

Thomas and the Green Controller is a book in the television adaptation series by Dean and Son.

Plot
When The Fat Controller is poorly, Lady Hatt puts someone new in charge. Percy - the Green Controller! He starts work and is soon bossing the other engines around, but is the job too big for a little green engine?

Characters

 * Thomas
 * Percy
 * Lady Hatt
 * Sir Topham Hatt

Trivia

 * This book is based on the tenth season episode The Green Controller.