Pt. 1. Gods and men
pt. 2. World changers
pt. 3. Spirits in the modern world
pt. 4. Contact: theoretical and personal.
Whisperers : the secret history of the spirit world by J. H. Brennan. ISBN 9780715645918. Published by Overlook Duckworth in 2013. Publication and catalogue information, links to buy online and reader comments.