Here are the key posts to get you started, or to refer to in the future. The bibliography in particular is likely to be updated from time to time, and links to chapters will be added as I post them.
- Ethiopian Philosophy: A Very Brief Introduction
- A Brief Annotated Bibliography of Ethiopian Philosophy
- Treatise of Zera Yacob, Chapter I, II, III, IV, V, VI, VII, VIII, IX, X, XI
I’ve also put together a PDF which includes the same introduction and annotated bibliography, along with textual selections from each treatise: Ethiopian Philosophy: A Brief Introduction with Bibliography (last updated November 16th, 2012).