Sustain Me by Barbara O'Neill is a comprehensive health book focusing on holistic healing and self-study. Written in English, this educational book is suitable for both secondary school students and adults seeking further education. With a range of beginner, intermediate, and advanced level content, it covers subjects such as medicine, nursing, and the healthcare system. This Australian-made book is a valuable resource for those interested in improving their health and understanding the principles of holistic healing within a Christian context.