Whicher poison was used most frequently in Agatha Christie’s novels? How many of her novels featured a butler? Exactly where on Teh train were the suspectst locaties in Murder on the Oriënt Express? How many actors have portrayed Hercule Poirot? Get a clue........or lots of them, in The Complete Christie, simpele the most comprehensive guide to the life and workshop of the immortal Dame Agatha Christie.