The term 'Arabic for 'BOOK'' can be answered with the word 'KORAN', which is a five-letter word. The KORAN is the Islamic holy BOOK, believed by Muslims to be the word of God revealed to the Prophet Muhammad over a period of 23 years. It is composed of 114 chapters and is divided into sections called suras. The KORAN is the central religious text of Islam and is widely regarded as the finest work in classical Arabic literature.