| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| After God is Dibia: Igbo Cosmology, Divination and Healing in Nigeria v. 1 | 978-0-907015-58-1 (0-907015-58-1) | 1998 |
| After God is Dibia: Igbo Cosmology, Healing, Divination and Sacred Science in Nigeria v. 2 | 978-1-872596-09-9 (1-872596-09-6) | 2000 |