John C. Sanford. 2014. FMS Publications; 4th edition. ISBN-13: 978-0981631608
From the prologue:
"In retrospect, I [the author] realize I have wasted much of my life arguing about things that don't really matter. It is my sincere hope that this book can actually address something that really does matter. The issues of who we are, where we come from, and where are we going seem to me to be of enormous importance. This is the real subject of this book."