
Steve Geddes |

One thing I'd mention is that Seekers of Secrets has been superceded by The Pathfinder Society Field Guide which doesnt make it a bad purchase but does make it somewhat out-of-date. (Plus, in my opinion, the Field Guide was a better book).
Having said that, I'd get the Inner Sea World Guide before getting either of the Pathfinder Society sourcebooks since I prefer general information on a campaign setting to specific information about one rather limited faction within it. I think you've got more work to do if you know lots about the Pathfinder Society and nothing about the world than vice versa.