Fear Street: The Stepsister 2 (R.L. Stine)
It's been like a whole year since Nancy tried to kill her sister and got sent to an institution, so of course she's ready to come home again. Emily starts out the book thinking about what happened over the last year and watching her stepsister Jessie move her things into her room so Nancy can have a room of her own. While holding a swan that someone gave Jessie after her mother died, Emily hears a scream that causes her to jump and break the swan. The scream came from Rich, her younger stepbrother. He got really dark over the last year and now spends all of his time working on a horror movie with his friends. Rich is pissed off because someone told their dad that he sneaked out and went to a party, which ended with him getting grounded for six weeks. Both deny him getting in trouble, but he doesn't believe them. Jessie's friend Cora-Anne comes over, forgetting that Nancy is coming home. She helps diffuse Rich by talking to him about horror movies. They h...