The Maturity Of Scout And Jem In To Kill A Mockingbird By Harper Lee "It is a sin to kill a mockingbird because they do nothing but make music for us to enjoy." This was quoted from To Kill a Mockingbird by Harper Lee, a creative novelist. To Kill a Mockingbird is about a young girl named Jean-Louise Finch, her brother Jeremy Finch and many other characters. Jean- Louise is nick-named Scout and Jeremy is nick-named Jem. Their father Atticus ,who was a lawyer, had been given a case to handle and did not have any choice but to receive it and work his best for his client. The case was about a