The Play of To Kill a Mockingbird | Harper Lee, Christopher Sergel
"In his play, Christopher Sergel has shifted the focus slightly. The result of this shift, I believe, hightlights the novel's universal qualities. [He] reminds us...that the issues explored are not those of a 'regional' work of art (as the novel is often categorised) but are of importance in Nottingham, Manchester, Birmingham or wherever the play is seen by an audience." - from Ray Speakman's introduction.
The Play of To Kill a Mockingbird | 
