Divine comedy
I just chanced on reading Purgatorio right after liber novus (read inferno last year) and so much clicked from LN. I just asked AI and it happened that Jung was immersed with the Divine comedy all the time he was writing liber novus. So yes, anyone who's enjoyed liber novus, go read purgatorio (I think it more meaningful and poetic than inferno personally but of course read the whole trilogy if you can afford it) - I used lombardo's translation, he kept the Italian original on the left side which I thought was cool (cool fun fact Invidia means both envy and lack of vision for you cant see yourself in others shoes when you're envious, nvdia anyways)