This book is the outcome of a close study of the Ricote Valley and its famous Sufi Ibn Sab'in. Its purpose is to disclose more of the historical and comparative data. Arab Spaniards have created a glorious human story that lasted for centuries within the scope of the Mediterranean culture. However, a lot of the history of the Ricote Valley is only written in Spanish and still not in English. Andalusian scientists moved from the region of Murcia to the heart of the Islamic world. Their move had quite a deep effect. Among these scientists was the great Sufi philosopher, Muhammad Ibn-'Abdul-Haq known as Ibn- Sab'in (d. 669 H. = 1270 AD), who came from the Ricote Valley. He is the originator of the deep philosophical approach in dealing with highly humanistic Sufi thought, and the author of the magnificent treatise Al-Kalam 'ala Al-Masa'il Al-Siqqilliyya, in which he answered the philosophical questions that Frederick II, the Emperor of Sicily, sent to Muslim scientists in the Mashreq and the Maghreb.