From publisher blurb:
Originally released under "Jaye's Games," this free guide was designed to introduce Pathfinder Roleplaying Game fans to the world of Rhune: Dawn of Twilight, a setting that can only be fairly described as Stormpunk! A unique setting with clockwork men (called automata), red mithral, and enough guns to keep the northern barbarians at bay - Rhune is an open playground for anyone with an interest in what happens when Ragnarök threatens all!
This guide contains detailed information on class selection, race variations, and even includes brief descriptions on some of Rhune's factions, as well as its gods!
If you're interested in exploring Rhune: Dawn of Twilight, this is the book you'll need!