D&AD 50: To Kill a Mockingbird, 1964

To mark its 50th birthday, D&AD is delving into its archive to highlight significant pieces of work that have featured in the awards. We will be publishing one a week with accompanying analysis by ex-Design Week editor Lynda Relph-Knight. This week, Derek Birdsall talks to Relph-Knight about his highly innovative cover for To Kill a Mockingbird