Heresy (or: The Impossible Task of Herman the Recluse)

In Heresy (or: The Impossible Task of Herman the Recluse), your task is simple. You must produce a tome of sufficient quality before dawn, or you will be sentenced to an arduous death by starvation by way of immurement - you will be walled in alive. Can you make it in time? Or will you need help from the dark beyond?