Harper Lee's "To Kill a Mockingbird" is a timeless classic that has been loved by many generations. Published in 1960, it tells the story of a young girl named Scout Finch who grows up in the fictional town of Maycomb, Alabama, during the Great Depression. One of the most fascinating and complex characters in the novel is Arthur "Boo" Radley, who lives next door to the Finch family. Throughout the book, Boo Radley changes significantly, which provides valuable insight into the novel's themes. This essay is an exploration of how Boo Radley changes in this way and why. At the beginning of the novel, Boo Radley is mysterious, reclusive, and considered a dangerous outsider figure. The residents of Maycomb gossip about Boo and create rumors about his life. They call him crazy and say he stabbed his father with the scissors he uses to cut his food. However, as the story progresses, Scout and her brother Jem come across several objects hidden in a tree hole outside the Radley house. The children realize that it is Boo Radley who leaves them these gifts, including a watch, coins and soap figurines. This hints that Boo is not as crazy or dangerous as the town thinks and that he is in fact reaching out to Scout and Jem in a subtle way. Throughout the middle of the book, Boo Radley becomes a significant presence in Scout. and Jem's life - both physically and through their imagination. Scout and Jem become increasingly obsessed with figuring out who Boo Radley is. Scout wants to meet Boo and see him with her own eyes. Jem, on the other hand, wants to reach out to him and thank him for the gifts. Little by little, Scout and Jem begin to identify with Boo and see him as a real person. They begin to care for him, leaving him a blanket on a cool night. In the final act of the novel, Boo Radley undergoes an extraordinary change. He saves Scout and Jem's lives from a knife-wielding Bob Ewell, who tries to attack them. Boo kills Bob Ewell, the novel's antagonist, and takes the injured Jem home. This act of heroism shocks the reader's system because it shakes up the town's perception of Boo Radley. This confirms that he is a valiant person willing to risk his life to protect others. Additionally, the scene is a poignant reminder of Boo's humanity and how courage can arise from unexpected places. Boo Radley's character arc in "To Kill a Mockingbird" is significant for several reasons. First, it shows that the theme of courage is not limited to performing physical feats or giving isolated speeches. On the contrary, it manifests itself in ways and forms unexpected among ordinary people. Boo Radley's courage, humility and selflessness are more powerful than any grandiose speech or gesture. Second, it reinforces the idea that change can happen even to an inherently mysterious character like Boo Radley. As the book progresses, Scout and Jem identify more and more with Boo Radley, and this new empathy changes their behavior and the way they view Boo. Finally, Boo Radley's transformation shows how people can be misunderstood by baseless rumors and prejudices. The transformation of Boo Radley's character in "To Kill a Mockingbird" is an important part of the novel and offers unique insight into its themes. As the book progresses, Boo Radley becomes less of an enigma and more of a human person. Through his interactions with Scout and Jem, Boo demonstrates compassion, selflessness, and courage in ways that are unexpected but reinforce the critical themes of the novel. At the end of the