I read Mockingbird by Kathryn Erskine in about one day. Now I've read other books unique narrators such as Caitlin, the 10 year old main character with aspergers in this book. But what I haven't seen thus far is where characterization goes so far, that the author embeds the character into the grammar and punctuation of the book.
Caitlin capitalizes certain phrases that she uses a lot, such as "Get It". It emphasizes her struggle to understand concepts that come naturally to her other classmates. Such as a chart with "Your Manners" that she refers back to constantly to understand the emotions and interactions around her.
On the surface, it appears that Caitlin's indifference towards emotions make her immune to the tragedy of her brother's death. While others around her are falling apart with emotion, Caitlin seems straightforward about the situation. But as the novel progresses, it's clear that Caitlin misses her brother just as much as everyone else. She just sees the situation through a different perspective. And in the end it is this perspective that provides the key to healing for Caitlin and her dad.