Multiple choice general knowledge Who has authored the book ‘Cadbury’s Purple Reign’? John Bradley Todd Stitzer Roald Dahl Sir John Sunderland Reveal answer Fill a bubble to check yourself A Correct answer Explanation John Bradley authored 'Cadbury's Purple Reign' about the Cadbury brand. Todd Stitzer was a Cadbury CEO, Roald Dahl is a famous children's author, and Sir John Sunderland was a Cadbury chairman, but none wrote this book.