An awesome product.
This book does, for me, what HeroWars/HeroQuest set out to do...build a rules-medium Narrativist RPG where The Setting Matters.
Building on Robin Laws' foundations, this iteration gets it right: it's smooth, infinitely expandable, and, best of all, no wonky dice mechanics, instead, there's a simple, intuitive percentile engine.
Well-written, beautifully illustrated by Storn Cook, packed with examples of how to hack the system for everything from D&D-esque fantasy to mecha sci-fi, to gritty cop drama, this is the game that could bring storygames to the grognards.
Love it, love it, love it...one of my favorite RPG purchases of 2011.