This book create a meaningful understanding concerning the prominent Oromo religious ritual known as a?˜Irreechaaa??. The author made a comprehensive analysis of Hoora Arsadee and Hoora Bisiil Irreecha ceremonies celebrated among Tulama and Macha Oromo respectively. Dr. Zelalem Teferra (PhD) Addis Ababa University This work consists of ethnographic, Linguistic and socio cultural documentation. It is important ground work for every one who interested in culture, language, history and anthropology of Oromo community. Kallach Oromia newspaper (21, April 2011 page 5)