To Kill A Mockingbird: Coming of Age of Jeremy Finch The coming of age of Jem, Jeremy Finch, is shown in many ways through out the book To Kill A Mockingbird by Harper Lee. He changes socially. He changes mentally. His feelings change emotionally. He also changes to become more of an adult figure. Another way he changes is that he changes physically. Jem changes through out the book socially by the way he starts having better feelings toward other people. There are many times when Jem start feeling bad for other people in the story, like when him and scout get in a fight but even though their mad at each other he still is grow up enough to know that h