To an American public opinion, anchored in the belief that Islam is all Arab, "Understanding Islam - The Persian Imprint" demonstrates it to be off the mark. The truth is that Iran (the Persia of old) fractured Islam's identity twice: causing it to be non Arab, first; and provoking its schism later. Further, the World identifies Islamic Men of Science, and their stellar achievements, as Arab whereas, in fact, they were all Persian and Turkomen. A book whose time has come.