Cover: An arresting cover that ticks the Appendix N boxes: a haunting oil-painted portrait, fonts that scream 1970s and distressed paperback look, as if you had just picked it off the pulp fantasy shelf in your local second-hand bookshop.
Interior art: Weird Tales pencil artwork works very well.
Interior layout: I like the limited choice of colour palette, it’s a case of less is more. The green bars on the table are lighter than the green used for the bold text and on the map, maybe it would look better if they were all the same shade? Though the dark green/black combo is harder to read so maybe not.
The columned text layout is for the most part attractive and easy to read. Just a few places where the text bumps up against the table and artwork could do with more space to breathe.
The Adventure: Nice concept and outline, with a lot of potential for role-playing, investigation and negotiation. Due to the space constraints imposed by this jam, the GM will have to put in some time fleshing out the details (or be good at improvising). Given the space constraints, I wonder if the table of terrain types and distances is a good use of space. I think if I was running this I would be inclined to hand-wave the moving from location to location and focus on the political and personal interactions.
Nice work, very pretty!