As Willow Creek Community Church's key evangelism leader for over sixteen years, Garry Poole is the innovator of seeker small groups and a strategist of creative outreach initiatives. Passionate about reaching people for Christ, Garry and his team have trained thousands of leaders to launch seeker small groups in their own settings. His award-winning book, Seeker Small Groups, provides a detailed blueprint for facilitating small group discussions that assist spiritual seekers with investigating Christianity. He also wrote The Complete Book of Questions, a collection of 1001 conversation starters and numerous group study guides including The Three Habits of Highly Contagious Christians; The Tough Questions Series, and Experiencing the Passion of Jesus (with Lee Strobel) to accompany Mel Gibson's film, The Passion of the Christ. In 2005, it became the first discussion guide ever to receive the prestigious Charles "Kip" Jordon Christian Book of the Year award. Garry lives in suburban Chicago.

Lee Strobel, former award-winning legal editor of the Chicago Tribune, is a New York Times bestselling author whose books have sold almost twenty million copies worldwide. Lee earned a journalism degree at the University of Missouri and received a Master of Studies in Law degree from Yale Law School. He was a journalist for fourteen years at the Chicago Tribune, winning Illinois' top honors for investigative reporting (which he shared with a team he led) and public service journalism from United Press International. A former atheist, he served as a teaching pastor at three of America's largest churches. Lee and his wife, Leslie, have been married for more than fifty years and live in Texas. Their daughter, Alison, and son, Kyle, are also authors. Website: www.leestrobel.com