FORTY RULES OF LOVE BY ELIF SHAFAK. The Forty Rules of Love is written by Turkish author Elif Safak. It is about Maulana Jalal-Ud-Din, known as Rumi and his spiritual teacher Shams Tabrizi. This book explains how Shams changed the life of Scholar to a Sufi through love. This books has sold more than 750,000 copies in Turkey and in France.