We're all heroes on a journey. And to understand how to write your characters you first have to understand YOU, because of course every character comes out of us writers, and is part of us.
This book will show you the archetypes (based on Jungian psychology) that are within all of us, and within all our stories, and one diagram in particular, the circle (of course), will add to what you know already: every story has three acts, and every middle act can be broken in two, and it's all a circle, and really we're all rewriting our stories of life all over again, and they're all the same. The structure, that is. And the characters. And they all follow the same growth pattern (or not). Enlightening reading.