Chip Ingram is the teaching pastor and CEO of Living on the Edge, an international teaching and discipleship ministry. A pastor for over thirty years, Chip is the author of many books, including Culture Shock, The Real Heaven, The Real God, The Invisible War, and Love, Sex, and Lasting Relationships. Chip and his wife, Theresa, have four grown children and twelve grandchildren and live in California.
Tim Walker is the lead editor for XP3, an online student curriculum and strategy from The reThink Group. A graduate of Lee University, Tim and his wife, Jennifer, have three children and live in Woodstock, Georgia.