ways in which Christopher’s character has changed over the course of the novel.

At the start of the novel, Christopher is 15 years, 3 months and 2 days old. Christopher has Asperger's syndrome and is the narrator of this novel. He has the difficult relationship with other people common to those with severe Asperger's, and he doesn't like to be touched. He is incapable of telling lies. The novel ends on a note of total happiness and hope. Not only has Christopher found his mother and normalized relations with his father, but he has also begun to learn to express his emotions in a way that is understandable by most people. He has written this book, which he knows is a huge accomplishment. But he also notes that his A level made him feel glad by drawing a smiley face - perhaps he doesn't smile himself, but he can identify his feeling with a facial expression. He has made progress.