From publisher blurb:
WHAT IS RULES of the HOUSE?: It is a list of quick, alternate rules plugins for your Micro Chapbook RPG games. The game system is specifically designed to be modified and updated based on what you want out of the game. As such, here are a few simple pointers to help you along.
Some Items Included Are:
New rules for rolling high to succeed instead of low.
New rules for making dungeons shorter and faster OR for making them long and sprawling ordeals if you wish.
New rules for "Mighty Items"
A trap chart for random traps in rooms.
A short NPC chart for running into random non-combat encounters in the dungeon.
For your ease, core rulebooks in this system have white text for their titles and supplements have colored text.