Sweet Valley High #100: The Evil Twin (Inside Flap)
Bahahaha. Here, Elizabeth is confronted by psycho Margo, who has been secretly impersonating Elizabeth at school, home, etc. over the past few weeks in preparation to murder her and steal her life. Margo's back story is that she was neglected in the foster homes she grew up in. She just wants a normal life, see? We don't recall why she picks Elizabeth (wouldn't you rather be Jessica?) but whatever. The twins aren't on speaking terms throughout the book because of some prom-drunk-driving-trial nonsense, but they make up when Jessica walks in on the attempted murder and shields Elizabeth's body with her own. Also pictured here: the twins look like their mother next to the Christmas tree while Margo lurks around outside and Todd is unconscious after being hit in the head with a statue.