From publisher blurb:
Gostor is a Grumpy Old Schooler's Take On Rules. A series of product aimed at providing, simple yet robust rule additions to expand the game
Skill encounters provide the author and game master with a framework for skill-based encounters using the Pathfinder system or the 3.x version of the world’s oldest role-playing game.
A full description of the philosophy behind what a skill encounter is and why is it different from other encounters. Three fully statted out encounters are provided within.