The art and layout are fantastic. Phenomenal use of the black and white in service of the theme of the module. The logo is great as well.
In terms of writing, The Rite of Passage throws a lot of new concepts and jargon at us in a short space. There were several sentences that I had to pause and reread, the search back through the previous text to sort out what is happening.
I feel like there are so many great ideas, but they are lost a bit in the lack of clarity by not having enough space to get fleshed out more and this impacts the "utility". For example, the "Sol-mates" is very clever and add flavor, but I spent time trying to determine what the importance was Sol-mate vs Enlightened and I don't think it impacts the game play. All the priests could just be sol-mates or Enlighted and it would be fine, unless the players are expected to rescue their specific sol-mate during the long night. It would probably be best to stick with just one term for simplicities sake. I can identify more examples if you would like, but I don't want to belabor the point.
That said, I love the concept, the monsters, the church and priests, all of it really. I think to take it to the next level, you'd have to make some tough choices on cutting down material to simplify and make it more accessible or expand beyond the trifold format to flesh it out more.
Viewing post in Sol incarnate jam comments
Yes. I did jam pack this module. I was just so inspired. There's a virtue in being concise and cutting the fat. As the writer I believe all of it is necessary to be there, but that's not always true!
Regarding the Sol-mates, though, I would be hard pressed to remove that as it underlines a big motif in the game about codependency being an unhealthy relationship. The pilgrims physically and emotionally yearn for their sol-mates while the sol-mates feed of off their literal life essence. That's why you are "assigned" a sol-mate and mechanically get the "bonded" condition where you have do a sanity save to resist them calling out for help during the Long Night.
The enlightened is what this religion calls their priests and is the false promise for the pilgrims' transcendence that ultimately brings them to their demise. So both terms are needed in this case.
But I do take it seriously that the module can be dense and hard to quickly pick up, read, and play. I will look into ways to cut some fat after the Jam!