A heartwarming story told through the ages: Something unique enters a young man's (or woman's) life, and they form a bond that changes them forever, usually starting them down the path to adulthood. What that something is, however, varies widely. From the classic "A Boy and His Dog", all the way to... well, keep reading, you'll see. Be warned, however, that whatever X is can easily fall victim to Death by Newbery Medal, especially if it's of the huge and/or monstrous variety. Examples of A Boy and His X include: