if you're looking for books you can easily buy them on the web.
about the books i suggest to start from the beginning, reading your Bible, knowing that the ethiopian canon is bigger than the catholic or anyway western one: the ethiopian Bible contains many books more than the west, such as Enoch, Jubilees. Here http://members.aol.com/abaselama/iyaric.html you will find the exact translation from amharic into iyaric of His Majesty Bible, the one He ordered for ethiopia, and so the most correct.
inthis way you will understand, by the grace of Jah, the edenic conscence of RasTafari, because just with education a man can free himself from the bondage of false preachings and teachings.
of course books alone are not enough, we all need the Mercy and the Guidance of the Most High Jah to understand His Words and to be kept on the true and right path toward wisdom and life eternal.
For anything just ask.