Goosebumps The Werewolf of Fever Swamp

It started with the strange howling at night. Then there was the dead rabbit. Everyone thinks Grady's new dog is responsible. After all, he looks just like a wolf. And he seems a little on the wild side too.

Grady knows his dog is just a regular old dog. But dogs don't howl at the moon and disappear at midnight, or do they?