Two beloved classics from internationally respected author and Bible teacher Derek Prince, now available in one handsome volume. They Shall Expel Demons What are demons? How do they gain entry? Do Christians ever need deliverance from demons? In this practical, comprehensive handbook on deliverance, bestselling author and Bible teacher Derek Prince addresses the fears and misconceptions often associated with the subject of demons. He describes nine characteristic activities of demons, seven ways demons gain access to people's lives, and nine steps leading you to deliverance. Secrets of a Prayer Warrior How can I pray confidently? How can I be certain my prayers will be answered? What is intercessory prayer? Bestselling author and Bible teacher Derek Prince answers these questions and many more in this definitive guide to effective, life-changing prayer. Through examining the teachings of Jesus and the Old Testament prophets, Prince hands you the keys to biblical prayer while unlocking insight and understanding that will help you grow as one of God's prayer warriors.