Oh... not a terrible lot but it's not like I've read through all the books or even understand all of them. A lot of them just reference strange things, and most of them are fiction, or-- or it's hard to tell, here.

[ It does seem to be working, to calm him down, to let him ramble on about books and research. ]

I've gone through a lot of them with a fine-toothed comb but I was needing more time, and-- well, I'm not the expert in everything, I must've missed some clues.