Harper Lee’s To Kill a Mockingbird remains one of the most beloved American novels of all time. Famously, Lee never completed another book, once declaring she’d ‘said what I wanted to say and I will not say it again’. But a journalist who went to Lee’s home in Monroeville, Alabama in 2015 learned of another book that Lee had worked on, perhaps for decades — again the story of an Alabama courtroom trial with a black defendant and white lawyer, but this one was true.