Hey all! I'm looking for some new resources -- hopefully system agnostic -- that fall into the categories listed in the title.
There are a few I'm already thinking of like the Lost Pages stuff (Wonder & Wickedness, Hamsterish Hoard of Hexes, Book of Gaub), and a few I found on Itch (like Florilegium Ex Miscellanea).
I just love collecting these things, so finding more is a pretty high priority as I continue to build out my RPG library. Are there any favorites that people have discovered?
Codex Seraphinianus and the Voynich Manuscript come to mind. Both are only really practical as digital downloads, as the former is highly collectible and the latter is a centuries old one-off handwritten tome. Both have the advantage of not being based on any known real-world religions (unlike, say, the Key of Solomon).