Are we allowed to discuss the full book yet.
Pretty sure we are. I mean, why wouldn't we be?
Can you tell us in general terms what it adds to the rules/lore? Who do you think should be buying it?
It adds several new setting chunks/cities, an update to the timeline, and some new rules which seem mostly to have to do with spellcasting.
I'm not done reading, but I'd say anyone who's really into Dresdenverse lore or the RPG should buy it if possible. Casual fans of either can take or leave it.