From publisher blurb:
For nearly two hundred years, the nations of northern Magbiren have fought each other in a never-ending struggle. This expansion to the GILDED SUNS campaign setting for the First Edition of the Pathfinder Roleplaying Game explores northern Magbiren and the wars they fight for reasons they don’t remember.
Included in this book are over 30 new firearms, epic level progressions for the GILDED SUNS classes, new feats, new airships and tanks, and a detailed gazetteer of the 28 nations of northern Magbiren.