The Book of Purgatory is a comic adaptation/reinterpretation + crossover story between classical works of literature, depicting the stories themselves, and what could have happened after their endings. At the forefront of this story is Doctor Faust, and his demonic companion Mephistopheles.
So many things end, but in the world’s eternal nature, all endings form a beginning of something else.
Some quotes are directly from the Kaufmann English translation of Goethe’s Faust.