Hank Hanegraaff has been president of the California-based Christian Research Institute. He also worked as the host of the Bible Answer Man radio broadcast, which can be heard six days a week throughout the United States and Canada. With an audience of more than 120 million people, Hanegraaff urges his listeners to "contend for the faith that was once for all entrusted to the saints." Hanegraaff is the author of such books as Personal Witness Training: Your Handle on the Great Commission; Counterfeit Revival: Unmasking the Truth Behind the Worldwide Counterfeit Revival; and Memory Dynamics: Your Untapped Resource for Spiritual Growth. As the general editor in the updating of Dr. Walter Martin's classic The Kingdom of the Cults, Hanegraaff presented detailed ways to protect worried parties and their loved ones from cults. Also a regular contributor to the Christian Research Journal, Hanegraaff conducts seminars and lectures worldwide.