A story where two sisters move to this small town and it has a sign that lists how many residents live there. The younger sister befriends the main protagonist girl in the story. The new girl’s older sister is a goth I think? She starts dating the main protagonist’s older brother. The goth sister dies I believe and the brother is very sad about it. Because of what happened the younger sister and her family move out of the town. The protagonist changes the population number to include her friend as someone who lives there. I think her name was Summer.
Lost Classics of Teen Lit: Name That Book! 