Nash glances to Mia as if to ask something. Mia's look back suggests that she's used to this before she answers Autor.

"You meet him as soon as you arrive, as part of the trial is obtaining a password to give to Damon. He's also present for all of the trials themselves. Once you pass the trials, you have access to the library forever. I'm sure you've run into a book or two about the obscuring magic but it's possible that Damon's is written directly into the library, as he's the author of many of the books in there. As for persuading Damon, I haven't a clue."