The Three ??? Kids, 95, Secret Signs

Justus, Peter, and Bob are best friends and detectives! Together, the three ??? have already solved many tricky cases.
A rich family's villa has been burglarized. While examining the crime scene, the three ??? Kids notice a strange chalk mark. They had only just recently discovered one exactly like it on the fence of the junkyard. The three detectives find out that these are typical tramp signs, which thieves use to alert their accomplices to good loot or other things. Now it's time to prevent the next break-in and catch the culprits!

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Manufacturer / Responsible person:
Franckh-Kosmos Verlags-GmbH & Co. KG, Pfizerstraße 5-7, 70184, Stuttgart, Germany, kosmos.de/servicecenter