They Shall Expel Demons : What You Need to Know about Demons, Your Invisible EnemiesWHAT ARE DEMONS? HOW DO DEMONS GAIN ENTRY INTO PEOPLE'S LIVES? DO CHRISTIANS EVER NEED DELIVERANCE FROM DEMONS? In this readable, biblically based book, Derek Prince answers these and many other vital questions. If you are struggling with problems that never seem to go away, has it ever occurred to you that demons may be at work? Or perhaps you want to help others with such problems. Derek Prince points out that "Jesus never sent anyone out to preach