"Developed by literacy experts in partnership with educators for students in PreK through grade two, this book introduces beginning readers to trains through simple, predictable text and related photos"--

Thomas the tank engine befriends Stephen, an older engine who has become outdated, but Stephen finds a place he fits in when Ulfstead Castle is restored.

Simple rhyming text and illustrations tell about Blue train Thomas who works all day and Green train Percy who works all night.

A little green engine fears he has caused a terrible accident and Thomas the tank engine attempts to track down the truth.