ስለዚህም ፕሮፌሰር ኤርሊች በ2007 Saudi Arabia & Ethiopia [ISLAM, CHRISTIANITY & POLITICS ENTWIND] በሚል ርዕስ ያሳተመው ግሩም የታሪክ መጽሐፍ ላይ የተመሰረቱ ታሪካዊ ቅንብሮችን በተከታታይ እናቀርባለን።
Kanaafuu Erlich bara 2007 "Saudi Arabia & Ethiopia [ISLAM, CHRISTIANITY & POLITICS ENTWIND" mata duree jedhuun kitaaba seenaa baay'ee faayida qabeessa maxxansan irratti seenaalee hundaa'an qindeessine ni dhiheessina.