The story, as well as Susie's issue in the story is watching these three persons (her mom, her Dad, and her sister) go through the 5 stages of grief which are: denial, anger, bargaining, depression, and acceptance. Each of the three had their own way to go through the process, and none of them did it neither similarly nor in order. One's process affected the other's. It was a triangulation and a continuum that did not seem to have a final end the way that it says that the 5 steps of the process end.
Throughout the novel, Susie experience the grieving process with them, and tries to help each of the three the best way she can from her heaven.
In the book "The Lovely Bones" Lindsay Salmon sneaks into Mr. Harvey's house to try and find evidence against him. She believes that he is her sister Suzie's murderer. She had gone into his room and found a notebook that had some figures in it. On one page she had found his plans for a small hole below the ground with her sister’s name on it. She tore the page out.
Mr. Harvey heard her and went to find out who was in his house. Lindsay is running from him. She gets to the basement window that she had entered through when she had broken into the house. As she is climbing out Mr. Harvey is looking at the back of her shirt. She is wearing a soccer shirt. The letters 5-5-5 are on her shirt.
"The silkscreen number on her back screamed out at him 5-5-5."(208)
5-5-5 refers to Lindseyss numberrr on herr jerseyyyyy