Savvy Librarian

From LegendWiki

Savvy Librarian [Skill]

If it exists, you've read about it.
Prerequisites: Geography or History as a trained skill
Benefit: Choose either Geography or History. You gain a +2 feat bonus to the chosen skill.

Additionally, whenever you would attempt a Knowledge skill check of a type relevant to a creature against a creature of that type (Medicine against a [Humanoid], for example), you may make a skill check with the chosen skill instead.