I've just finished wrapping up book 4, and to put it lightly, it was not the favorite for either myself or my players. Their characters were especially upset at the attitudes of the Illmarshers all around. They managed to leave (barely) without burning the entire place down and hunting down the Sherriff for his head. I'm curious how this setting and events played out with other groups. I'm also interested in hearing how other characters handled the fallout in the town and the political vacuum caused by the removal of the church and the mayor.
Then it should be your favorite! That's exactly the reaction it generated in our party! We hated that place, and it's that installment which which stayed with us the most through the entire AP.
In our AP - Our gnome alchemist lost his sanity completely during this AP and carried and had intimate discussions with mayor greely's brain for the rest of the AP!
In the end, I believe our Life Oracle of Pharsama who was a no nonsense, straight laced, victorian midwife returned following our defeat of the WW to try and help the survivors.
But yeah! This was the highlight book for us and we still talk about it today three years later!