The short stories how all the portents appear and the peoples react, go to Shyish and begin fighting Nagash. The series as a whole I think. Hard to separate it.
I have the legal right as OP to do so. I'm going to be writing book reviews for Warhammer books and posting them soonish
Flesh-Eater Courts, really neat idea and I love some of their art. Just the idea of these savage, desperate monsters believing they are still the glorious people of a grand kingdom is really cool to me, and I like how some of their rules reflect that (the delusions). I'd play them if their big bats weren't so ugly and I had more money.
I'm rather fond of one small entry in the Seraphon army book that mentions how a king pledged himself to Tzeentch with a ritual, only to end up summoning a seraphon warhost at the end of it. It was almost like it was... just as planned.
Do I even need to explain what my favourite lore items are? I'll give you all 3 guesses - not 3 guesses each, mind you, that would be way too fair