Yora
Legend
It's a slam dunk for The Savage Frontier. Not just the best FR sourcebook, but perhaps the best campaign setting book ever made for any game.
It's almost a complete setting in itself that is written to provide GMs with a starting point to create their own content for their own campaign, not a tome of details that restrict what you can do.
It's almost a complete setting in itself that is written to provide GMs with a starting point to create their own content for their own campaign, not a tome of details that restrict what you can do.