The Werewolf of Twisted Tree Lodge is a novella written by R. L. Stine. It was first published in 1998 and is the 31st book in the Give Yourself Goosebumps book series.
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"The Revenge of the Werewolves" - that's just the title of your horror story that just own first prize. Too bad you didn't actually write it. Too bad you decided it would be a good joke to turn in the story you found in the trash. Because now the joke is on you!