Dewey's Checking In!

Right now, I'm about half-way through the book and I've noticed that the book shows the outside facts about Dewey, but also shows the impact he has on the people around him. For instance, on page 10, the discovery of Dewey is told by the head librarian's point of view. This allows the reader to grasp how great of an emotional impact Dewey left, even if he himself did not know it. I wonder though, why the author didn't write this book like the novel, Flipped, was written, where each chapter alternates perspective. I suppose that it would be chunkier, but it's very easy to get lost in this book's format with the "chunks" being a good four or five chapters each.