If you are interested in Armenian saints, there is a book called The Light of the World/ Lives of Armenian Saints
. It is published by St. Vartan Press, but I couldn't find it on their website. I did, however, find it on Nareg.com. The ISBN number is 0-934728-40-2.
I think this is how you get to it:http://narek-store.com/shop/SearchResults.asp?ProdStock=BK%2D5768&inexid=62XAWCNGWG
I am not good at copying and pasting. Hopefully, I did it right.
I have plenty of materials on Coptic saints, but I also would love to find books on the saints of other Oriental Orthodox churches.