Diary Of A Dead Girl

Sammie Trescott, 16, Left her diary behind as she chose to end her life by hanging herself off a tree 5 minutes away from her local school. No-body enters Sammie's room apart from best friend, David, Who repeatedly goes back to read Sammie's diary and look for clues in her room, trying to understand what is happening.
Until his whole world takes a turn as he finds out that although Sammie is dead, doesn't mean she is gone. Soon he finds new entry's in the book, in her handwriting after the date of her death. And each time he goes back, another entry is added. Is she trying to speak to him? Is she in the room in spirit as he reads?