George Barna’s work in faith-based statistics and leadership (The Barna Group) is frequently cited as an authoritative source by the media. He is widely considered one of the nation’s most influential Christian leaders. George has written 48 books, including best-sellers Revolution, Transforming Children into Spiritual Champions, and The Power of Vision.

Erwin Raphael McManus is the lead pastor at Mosaic in Los Angeles, CA. He is an iconoclast known as a cultural pioneer for his integration of creativity and spirituality. He is also the author of Soul Cravings, Chasing Daylight, and other leading books on spirituality and creativity. His newest book, The Artisan Soul, is a Los Angeles Times and Publishers Weekly bestseller and is now available.