When Two Quarrel...

When Two Quarrel... is a German book, illustrated using photographs from the television series.

Plot
Donald and Douglas fall out and go their separate ways. Soon, they start to miss one another, but neither will admit it. However, when Donald has and accident Douglas is called upon to rescue him.

Characters

 * Thomas
 * Duck
 * Donald and Douglas
 * Trevor
 * Sir Topham Hatt

Trivia

 * This book is based on the sixth season episode, Twin Trouble.