From publisher blurb:
Throughout history, and fantasy, leaders have come in all shapes and sizes. From Attila the Hun, whose battle prowess and skill with a horse made him lord of the Mongols to Tyrion Lannister, whose cunning and wit inspired others to follow his lead. Even a mythical figure like Odin used his wisdom over his personal magnetism to lead the Asgardian gods down the path he felt was best.
In Pathfinder, the bulk of this is covered simply in the Leadership feat. This feat attracts cohorts and followers under a banner, be it for a holy crusade against evil, the building of a Thief ’s Guild, or simply a powerfully charismatic adventurer simply inspiring others to follow his lead.
This PDF is a collection of feats meant to improve and augment the Leadership feat. This includes how it can modify adventuring, fighting monsters, or some of the other sub rules for Pathfinder.