This document provides a summary of the key points in the characterization of Boo Radley in the novel "To Kill a Mockingbird" by Harper Lee. It discusses how Boo is initially portrayed as a mysterious and frightening ghost-like figure in the town, with rumors circulating about his appearance and behavior. Over time, as the story progresses and through the perspectives of Scout and Jem, their views of Boo change and they learn more about him, ultimately seeing him as a hero when he saves them from being attacked. The essay analyzes how Lee uses Boo's character to convey the message that people should not be judged based on rumors and initial impressions, and that the truth may be different than what is assumed.