Thought of a few more questions for the Q&As:
1) Harry has claimed Demonreach as his "sanctum" with the sanctum invocation. A sanctum is a person's own, private place, their own personal sanctuary. We already know most of the practical effects of sanctum spells, but I'm wondering if there are side-effects which might be similar to claiming a place as one's home. With that in mind, could Demonreach, without Harry living there, begin to develop a threshold? Could Harry hang wards on the place even without a threshold? If Harry did start living there, would the entire island begin to develop a threshold, covering the same area that's covered by the Demonreach genius loci?
2) Lea has apparently followed Harry for his entire life, protecting him from attacks coming through from the Nevernever. Given that he has lived in several places, does this mean that Lea is able to change where a place on Earth links to in the Nevernever, so that each of his homes were linked up to her killing ground? Or has Lea simply been following him around, claiming all of the places Harry's homes connect to in the Nevernever as her own, and then creating new grounds at those places? Will Lea be able to do this if Harry decides to live on Demonreach?
3) If someone is the subject of a bargain between a fae and someone else, does that person(the subject) have any rights under Faerie law? Do they have the right to know the terms of the bargain which concerns them?
I figure the answer to the last one is "no, of course not," but it seems like there could be a chance. Fae don't always seem to advertise the rules of their behavior, but they do still follow rules, like the one where a fae has to do something if they say three times that they were meant to do it.
I'm still unclear on how that rule differs from them not being able to tell a lie, unless the difference is that fae aren't usually bound by what may happen in the future. The saying-something-three-times thing could mean that, if they say they ought to do something three times, then they are bound to do everything in their power to actually do it. Otherwise, maybe they can write the statement off as being unable to control the future or something. Which I guess could be another question:
4) How does the fae rule about saying something three times differ from the rule against saying something that isn't true? Doesn't the rule against lying also prevent a fae from saying they will do something and then not doing it?