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- 1) Ethiopia and the Challenge of Independence 1986
- 2) Ethiopia and the Middle East 1994
- 3) Ras Alula and the Scramble for Africa.. 1996
- 4) Saudi Arabia and Ethiopia 2007
- 5) Alliance and Alienation: Ethiopia and Israel in the Days of Haile Selassie 2014
- 6) Haile Selassie: His Rise, His Fall 2018
- 7) Greater Tigray and the Mysterious Magnetism of Ethiopia 2023
