This classic work is an essential resource for anyone seeking effectively to understand and help people who believe themselves to be disturbed or invaded by powers which they cannot control. Revised and expanded to include material which has strong contemporary relevance, Deliverance is here made available as a new edition. Well-balanced in its coverage, judicious and responsible in its treatment of controversial subjects, and illustrated throughout by pertinent case studies, Deliverance will be consulted as the most authoritative handbook on the market for those counselling those who believe themselves to be psychically disturbed.