"We tried to tell them it was almost impossible," Morgenstern Books, Bloomington, Ind., posted on Instagram. "That only 4 people have solved the mystery of Cain's Jawbone (Edward Pothy Mathers) since its publication in 1934. We tried and tried and yet they still went ahead. And after 6 hours and 20 cups of coffee (15 of those just for Harry) our expected outcome was... failure. Obviously. But the gang had a great time and are excited for the next bestsellers adventure (once they start talking again of course)."
