Legend says a doomed monk, sentenced to be walled up alive, promised to write a book containing all human knowledge in a single night, and when the task proved impossible he made a pact with the Devil. The truth behind the Codex Gigas is even harder to believe.

This episode is a deep dive into the largest surviving medieval illuminated manuscript, the so-called Devil's Bible. We explore its staggering physical reality, its infamous portrait of Satan, and the 800-year journey of an artifact that fundamentally changes how you view human endurance.

• The sheer scale: three feet tall, 165 pounds, 310 vellum leaves requiring the skins of around 160 animals, needing two people just to lift it
• Its contents as a medieval library, from the complete Latin Bible to Isidore's encyclopedia, medical manuals, exorcisms, and magic charms ...