Who is the narrator, can she or he read minds, and, more importantly, can we trust her or him?
Third Person (Limited Omniscience)
Although the story's told from a third person perspective, we get to see the inner workings of Wendy's mind—which is helpful, because so much of what she experiences is internal. Terrible things happen to Wendy and her family, yes, but a lot of her turmoil is silent. Because we can probe into Wendy's thoughts and emotions, we see how much she is suffering, plus we get to see memories she has of her mother from before she died, which helps us better understand the significance of her death. This is critical for giving us the full impact 9/11 has on Wendy and her life.