I recently picked up Rise of the Runelords Anniversary Edition at the local bookstore for a decent price since they where going out of business. I have been a DM of AD&D 1st edition (Osric) for a while now and haven't ever touched anything beyond that edition of the game. I would like to get started with Pathfinder. I did find in the Runelords book I picked up that I should have the core rulebook, bestiaries 1-3, advanced player's guide, gamemastery guide, and inner sea world guide.
I was wondering if there is anything else essential to the campaign that I should have?
I did put in a order for these books (core rulebook, bestiaries 1-3, advanced player's guide, gamemastery guide, and inner sea world guide) along with a GM screen.