Confrontation in the Finis Africae

William and Adso enter the finis Africae and find Jorge of Burgos waiting for them. Jorge confesses to masterminding the plot to protect the library's most dangerous book: the lost second book of Aristotle's Poetics, which deals with comedy and laughter. He poisoned the book to kill anyone who read it. He also reveals that he has trapped and killed Abbot Abo in a secret passage.