Interesting. So, assume Mab took Harry's memory of: (1) Coming to BFS to see Marcone (and Mab) at the end of Skin Game, and (2) His basement lab, as it existed post-Death Masks. (I thought it was going to be about Little Chicago, but the silver summoning ring makes an appearance much earlier in Blood Rites, where we're told he upgraded it to contain Lasciel's coin, several books earlier)
Several other things not mentioned in Peace Talks (thus, potentially erased):
- Lasciel and Lash and Hannah Ascher
- The fact that Bonea is his daughter -- "Ever since the new-formed spirit of intellect had coalesced inside my mind, it had grown until it was too big for the space..." Perhaps I'm reading too much into it -- but Harry doesn't seem to remember how Bonea came to be in his head.
- Soulfire -- He doesn't ask Eb whether soulfire would be useful against the Corner Hounds, and his fire is suddenly "emerald" in color. In Skin Game he's hurling the "silver-white fire of Creation itself" -- and when he draws power into his staff making the runes glow, it's "green-white light and silvery soulfire". (And remember that he only got soulfire as a result of Lash teaching him to use hellfire...)
Combine with the inexplicable news that the Genoskwa is around, which suggests that Hannah Ascher, or at least Lasciel's coin, might have escaped as well...
And...
Well...
Only wild speculation beyond that.
But what if Mab and Marcone collected those coins for nefarious purposes, and had them with them at the end of Skin Game. Might they have worried that between them Harry and Molly might have been able to sense that?
Thorned Namshiel's coin went missing during another weird "Mab, Marcone, and the Denarians" adventure in Small Favor.
Wild and crazy theory: Marcone has three Denarians owing him favors -- the Genoskwa for the rescue, plus the new hosts of Lasciel and Namshiel for giving them the coins.
Wilder theory: Lara has Lasciel's coin. The first favor was erasing all memory of Lasciel from Harry's mind. This could explain Lara's "off" behavior through the book -- and Thomas could have made a bargain with Lasciel -- or even taken up a coin as part of such a bargain.
Even wilder guess: Marcone's had Namshiel's coin for well over a year now. Did *he* take up the coin? Did he give it to Hendricks (beard=evil!)? Did he give it to Childs? (Or did he give it to Mab, who wanted vengeance on the fallen angel that used hellfire on Arctis Tor, in return for a ton of help building his Barony -- hence the supernatural bank and hosting the Peace Talks...)