The secret formula to Agatha Christie's murder mysteries

With almost 100 mystery novels, each one a cleverly constructed puzzle box of clues, misdirection, and human drama, Agatha Christie is the best-selling novelist of all time. Her eccentric detectives, clever clues, and simplified suspects have stumped countless readers over the last century. So, how did she craft these perfect crimes? Jamie Bernthal dissects the writing of Agatha Christie.