Andy Barber is a fictional character from the novel "Defending Jacob" by William Landay. He is a dedicated assistant district attorney in Massachusetts who finds himself in a moral and legal dilemma when his son is accused of murder. The story explores themes of family loyalty, justice, and the complexities of the legal system. As the narrative unfolds, Andy struggles to balance his professional responsibilities with his role as a father. His character is portrayed as deeply conflicted, facing challenges that test his beliefs and values. The novel delves into the impact of the accusation on his family and the community.