To Kill a Mockingbird is one of the best-loved novels of the twentieth century. But for the last fifty years, the novel's celebrated author, Harper Lee, has said almost nothing on the record. Journalists have trekked to her hometown of Monroeville, Alabama, where Harper Lee, known by her friends as Nelle, has lived with her sister, Alice, for decades, trying and failing to get an interview with the author. But in 2001, the Lee sisters opened their door for Chicago Tribune reporter Marja Mills. It was the beginning of a long conversation -- and a friendship that has continued ever since. In 2004, with the Lees' encouragement, Mills moved into the house next door to the sisters. She spent the next eighteen months there, talking and sharing stories over meals and daily drives in the countryside. The Mockingbird Next Door is the story of Mills's friendship with the Lee sisters. Mills was given a rare opportunity to know Nelle Harper Lee, to be part of the Lees' life in Alabama, and to hear them reflect on their upbringing, their corner of the Deep South, how To Kill a Mockingbird affected their lives, and why Nelle Harper Lee chose to never write another novel.