The Three Investigators, Panic in the Park

Panic in Rocky Beach! Suddenly, harmless dogs in the city park turn into wild beasts, even attacking people. Does the strange black stone that the Three Investigators discover in the park have something to do with the animals' dangerous behavior? Where does it come from? What secret does it hold? Justus, Peter, and Bob set out to investigate. Unexpectedly, they get caught up in a new breathtaking and dangerous adventure. But are they really on the right track?

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