Derek O'Brien

• The Ultimate Business Quiz Book
• The Best Quizzes of Derek O'Brien
• The Penguin India Reference Yearbook 2006
• Bumper BQC - Vol. 1
• Derek's Picks
• Discover with Derek
• Hollywood
• Penguin Yearbook 2009
• The Ultimate Quiz Challenge
• Bournvita Quiz Contest Collector's Edition
• Bumper Bournvita Quiz Contest
• Cadbury Bournvita Book of Knowledge