From publisher blurb:
This concise primer represents some of the many forthcoming options available to fans of Rhune: Dawn of Twilight. It can (and should) be used in tandem with existing products, but need not be. Enterprising Pathfinder Roleplaying Game GMs and players are welcome to cherry pick their favorite options from the pages within, of which there are many.
You’ll find a whole host of options packed into this PDF including an updated prestige class (the Clockwork Adept originally appeared in Kobold Quarterly #16), updates to the Craft (clockworks) skill, updated clockwork equipment (specific to Rhune: Dawn of Twilight), the Clockwork Domain, six new clockwork spells, four new clockwork magical items, and a new subtype for constructs. All of this is designed for Rhune, but easily fits into any setting you might play!