Ethiopian Christianity: History, Theology and Practice (Online) by Philip F. EslerBegins with ancient accounts of Christianity's introduction to Ethiopia by St. Frumentius and King Ezana in the early 300s CE. Esler traces how the church and the monarchy closely coexisted, a reality that persisted until the death of Haile Selassie in 1974
A History of Ethiopia by Harold G. MarcusIn this eminently readable, concise history of Ethiopia, Harold Marcus surveys the evolution of the oldest African nation from prehistory to the present. For the updated edition, Marcus has written a new preface, two new chapters, and an epilogue, detailing the development and implications of Ethiopia as a Federal state and the war with Eritrea.