I have been reading the series for a long time and I have a few questions that maybe someone here can answer.
Who is Cowl? In DB where he is introduced, it is mentioned that his speech sounds inhuman gurgled like he's talking underwater, does he have gills?
What is the Parasite that is spoken of at the end of Ghost Story, as replacing Harry's heart, which was shot with a high power rifle? Are they speaking about the vines/roots inserted into Harry's veins? Or is there something actually replacing Harry's Heart?
Does Harry have repressed memories? Are these why he has such terrible headaches? Or did someone use black magic to redecorated Harry's mind when he was a youngster, and his mind is fighting it?
I have read that Mab was wounded, and that is why she is so angry. What could wound Mab? Was it the Athame that hurt Harry's godmother? Or was it the attack on Arctis Tor?
Was that Kimmler's Athame?
What evidence is there that Lash is still around, and still inside Harry's head?
Is the Merlin Black Council? He certainly sucks as a war leader, and Cowl said that the White Council was rotting from within. That seems to indicate that several White Council members, even Senior Council members are Black Council.
What is the prophesy associated with Harry's birth?
What is the history of Demonreach, and who was its previous custodian? And what does Harry custodian there? Are there mops and brooms involved?
In the battle of Chichien Itza in Changes, the Grey Council showed up to fight with Odin, one of the Old Gods. Is Odin one of its members? Who are the other obviously heavy hitters on the Grey Council?