Author Harper Lee ties together the two parts of To Kill a Mockingbird in the final chapters of her novel. Part One primarily deals with Jem's and Scout's fascination with the unseen Boo Radley, who they finally realize is not the ghoulish night prowler that local rumor portrays. By the end of the first half of the novel, the children have given up their games and attempts to make contact with him, allowing Boo the privacy that he desires. Part Two centers on the trial of Tom Robinson and its aftermath. It is apparent that Tom is innocent of the rape charges and that Bob and Mayella Ewell have concocted the tale. Tom is convicted and later killed; Bob is not satisfied with the final results, however, and he makes threats against Atticus and his family. On the fateful Halloween night, the two plots are tied together when Bob attempts to make good on his threats, attacking Jem and Scout on their way home from school. It is then that Boo finally decides to make his first appearance in the novel, coming to the children's rescue and killing Bob in the process. Bob's death is a fitting end for the man who has caused Tom's death, and Boo becomes the hero, saving Scout and Jem and earning the eternal thanks of Atticus. In the end, Scout comes to better understand two of Atticus' favorite lessons: That it's a "sin to kill a mockingbird" and how one must step inside another man's skin before first judging him.
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