Life is a resistance to what came before it, and to what comes after. The universe of things is the illusion, as is the sense of our birth as the beginning and death as our end.
At a primal level you know this to be true: the dullness of this world sends your mind wandering, and in dreams you've been given glimpses of elsewhere. You remember what this elsewhere felt like, because that's where you came from. Think back of when you were a child: late at night you'd wake up for nor reason, and your eyes would go to the closet, and the dark. Remember what that felt like, what you thought lurked there. The details don't matter -the details are gone. But the scent stayed with you. Others disregard it. Maybe you tried to, and can't. Know this: you suspected right. The hidden wars do rage all around you; and you suspect right every time you feel their echoes whispering down the back of your neck.
Take the next step. Let Belief be your key, your door and your doorknob. Let it guide you back to the place where you could will anything into existence by simply hoping (or fearing) it was already there. Because it most certainly was. Dreams and nightmares- Cogito Ergo Mundi Est - the Shadowside.
This book contains all you need to start playing. Character and StoryHost sheets, Rules, Setting, Factions, etc.
Update: You could also get this [in our first Bundle together with three organization sourcebooks](http://rpg.drivethrustuff.com/product/103415/Enter-The-Shadowside---Bundle-1-%5BBUNDLE%5D).