Really like the cover. Interesting way to approach the title too... focusing on one specific area with a rather detailed puzzle to solve. This would be easy to drop into other adventures, I'd think. Nice work!
Side note: I get "There was an error processing a page. There was a problem reading this document (109)." error when opening 'Odin's Prism.pdf' in Adobe Acrobat (current release, Windows). The title page won't load but the other pages do. It also doesn't load properly in Chrome. The Light Mode PDF opens fine with no errors.