This may seem dumb, and quite cheeky, but I once wrote a book about a popular teen girl who bullies someone that is thinking about committing suicide. She doesn't know that as she teases her, she only thinks it's harmless fun, and learns throughout the book how much words can hurt, and how much they can affect others, even to the point of suicide.
I won a contest with this story at my school in a competition, so I thought it was quite good, but i'm sure you can decide for yourself. :)
