The mathematical equations were very intriguing and thought-provoking, making one want to continue striving to learn more about this novel, as well as the vast world of number theory. The professor's research area was number theory. He is no longer able to actively research this topic due to his brain damage. A single mother, a housekeeper, was employed by an agency to look after a new client, the former teacher. After learning that the governess has a son, "Root", the teacher insists that he come after school every day. The governess remarked: “A number that went on forever and another vague number that never revealed its true nature now traced a short, elegant path to a single point. Although there was no visible circle, (pie) had come down from somewhere to join hands with e. There they rested, slumped against each other, and all that was left was for one human being to add 1, and the world suddenly changed. It all ended in nothing, zero. (Ogawa, 127). Together, they all bonded over math and baseball, going to baseball games to celebrate their wins and birthdays. This ties in with one of the main themes of the novel, which is that family is not always united by