Answer:
When a storyteller dies, the library burns is an old Moroccan saying quoted by Evan Turk in his book The Storyteller. It perfectly captures the point of the book, which tells us about the power of stories and storytelling. Storytellers carry the possibility of creating countless stories, countless books. Their existence is equivalent to entire libraries. When they die, stories that could have been created or weren't written down, are lost. It's as if an entire library burned down.