Help, Derailed!

Help, Derailed! is a German book, illustrated using photographs from the television series.

Plot
One day, Ben needs new buffers. Bill also wants new buffers, but his old ones are still fully functional. This leads to Bill falling into a pond. When Ben comes back, he helps Bill out and they are friends again.

Characters

 * Bill and Ben
 * Sir Topham Hatt

Trivia

 * This book is based on the sixth series episode, Buffer Bother.