Uncommon Methods of Diagnosis and Treatment in African Traditional Medicine (ATM) is a product of a Ph.D. thesis titled: Diagnosis and Treatment of Amodi in Ifa Divination Among the Yoruba of South Western Nigeria. It is a research in the area of diagnosis and treatment of difficult, psycho-social ailments among the Yoruba. The book is an account of UNCOMMON methods used in the diagnosis and treatment of Amodi. Ifa divination is an uncommon method because it differs significantly from orthodox healthcare method and procedure. The Yoruba have a way and a method of diagnosing and treating ailments that do not manifest known order of symptoms as is the case in orthodox healthcare, such unusual cases are committed to prayer or any other means that is beyond the established orthodox method. To achieve the results contained in this book, the author examined such ailments that were referred to the babalawo, these were distinguished from aisan ara (physical disease) - conditions that are diagnosable and treatable using Western methods. Ifa divination is not an everyday first choice of method of diagnosis, it only comes to use when the cases have failed all naturally known methods of diagnosis or there is an upfront suspicion of difficulty in diagnosing a condition using natural methods. One can say that Ifa divination is the Middle Infrared Radiation (MIR) equivalent of the Yoruba traditional medicine. The study showed that Amodi manifested similar symptoms as aisan ara but there was no regular pattern, one type of symptom (inu-kikun - stomach upset), resulted from multiple causations such as lja Esu (attack from Esu), Eewo (taboo), Ori (personality soul), just as one causation (Eewo), presented multiple symptoms such as, oriitulu (migraine), egbo-adaajina (skin ulcer), inu-kikun. The causes of amodi that were found include: lja Esu (as found in one patient), Eewp (as found in four patients), Ori (as found in four patients), Iwa buburu (bad character, such as 'ole-jija- stealing', 'agbere adultery', as found in seven patients), Aje (witches, as found in four patients), Ai-ko-beere (lack of divination and Aje were found in one patient) and Iriri aye (life experiences, as found in three patients). Each of the found condition was treated in three stages Ebo (sacrifice) which took care of the spiritual and psychological aspects of the patients. Oogun/akose-ifa (medicine) treated the physical aspects of the patients and Ogbon-inu (inspiration) complemented the other two. This book is to challenge the practice of Western medicine to be more explorative and see what is useful and adoptable in alternative medicine. This is not a faith-based work, neither is it a prescription for those that do not share the faith of the practitioners, this work is a result of research that should challenge scientist to engage in more research. Teachers, thinkers, students of African Traditional Medicine, orthodox healthcare practitioners and the general public will find this book indispensable.