The Boy Next Door is a novella written by R. L. Stine. It was first published in 1996 and was the thirty-ninth book in the Fear Street book series.
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This guy’s got killer looks...
Lauren and Crystal think Scott has it all. He’s handsome. He’s the new star of Shadyside High’s football team. And he’s moved in right next door! Both girls will do anything. Say anything. Try anything to get the chance to go out with him. That’s all either of them want.
But that’s all Scott’s last girlfriend wanted, too—and now she’s dead.