What is the climax and resolution of Paul Fleischman's book, "Whirligig"?

The construction of this novel is especially interesting because the climax, which usually comes closer to the end of the book, actually occurs about a third of the way through, in Chapter 3, when Brent meets the mother of the girl he killed face-to-face. In this courtroom encounter, Mrs. Zamora gives him a bus pass and requests that he place a whirligig at each of the four corners of the country in memory of her daughter, and as a form of restitution for her death. This opens the door to the resolution of the story, which is Brent's journey of self-discovery. Through his experiences while traveling to complete his mission, Brent begins to resolve his feelings of isolation and disconnectedness with others and the world, and finds a sense of his own self-worth.