(From the publisher):
A small note, written in German is found by Pete inside a broken Cuckoo Clock. The message was a riddle. Imagine the surprise when Dad tells the family they're going to Germany to buy toys for the store. Just as they were boarding the plane, someone steals the Cuckoo Clock. They visit the clockmaker in the Black Forest and begin to untangle the riddle. Then it's a race against the thieves to find a valuable Golden Cuckoo Clock which had been stolen from a German Museum. A wild chase ensues and a thrilling boat ride down the Rhine.
Original title: The Happy Hollisters and the Cuckoo Clock Mystery
Genre: Fiction→ Children & Young Adult→ Mystery