Okay, I can't remember all of the details of this book as I read it about 12 years ago in year 7! But I'm really desperate to figure out what it was and reread it.
I remember a few specific bits about it but not the whole story;
It was a fairly short older child/young teen book with a black and orange cover(as far as I can remember), and may have been part of a series.
It was about three girls who were best friends, one of them had roller skates covered in stickers, and in one bit she has them slung over her shoulder at a train station, and a boy is bullying her and pushes her(or she falls) onto the track and is killed.
The next bit I can remember is when one of the other girls is sat in class and sees what she thinks is a white rat, but it turns out to be her dead friend's hand.
If anyone can help with the name of the book this would be awesome, thanks in advance 