When I sat down to write this book for my good friend, the first question I asked myself is, "What exactly is inner game?" Oh, sure, I've seen the term thrown around enough and I'm sure many people reading this have as well. But by definition, what is inner game exactly? It bothered me that I couldn't answer this question so readily. A wiki search and a dictionary search both proved pretty useless.
So after a day or so of meditation, the best definition I can give is this: your inner game is your emotional state as it stems from your perceptions of yourself and the world around you.