So, after the Pathfinder Roleplaying Game came out, Paizo shifted from Pathfinder Chronicles (3.5) to Pathfinder Campaign Setting.
I was wondering if anyone had a good list of books that have been completely outdated, semi-outdated, and not outdated at all. I'm also curious as to which books Paizo now considers part of the campaign setting. (I have a copy of the Pathfinder Chronicle Dark Markets, but the Additional Resources guide for PFS lists it as a Pathfinder Campaign supplement). I'm curious about this from both a mechanics and a lore perspective.
A couple examples I could think of that might help you understand:
The Inner Sea World Guide has since completely replaced the Pathfinder Chronicles Campaign Setting.
The Great Beyond (Chronicles) has not had (to my knowledge) a book published that replaces it completely.