J.R.R. Tolkien, C.S. Lewis, the Inklings, J.K. Rowling, and fantasy literature in general; language, linguistics, and philology; comparative mythology and folklore — and more.
For the Valar's sake, don't drop one on your toe!
Well I'm checking in again but evidently you are still in very deep. I empathise as life has dealt me a sorry blow that's keeping me out of action. Wish you well Jason.