The Book of the Lawful and the Unlawful is the fourteenth chapter of The Revival of the Religious Sciences which is widely considered as the greatest work of Islamic spirituality. Written by one of the most famous of theologian-mystics of all time, The Book of the Lawful and the Unlawful is unlike other Islamic works concerned with legal issues. Here, Abu Hamid al-Ghazali aims to teach his readers firstly the theory of what is lawful and what is unlawful and how to deal with dubious or ambiguous issues, and secondly how to apply the knowledge they have gained to their everyday lives. The main support for this application, especially in matters that are unclear, is caution or prudence (waraE?) and Ghazali explains the degrees of prudence necessary beginning with the prudence of the upright and ending with the prudence of the saintly. Thus the sincere practice of what is lawful and desisting from what is unlawful become integrated into one's spiritual life. As in his other works, Ghazali bases himself on the Qur'an and narrations from the Prophet Muhammad, followed by examples from the Companions, the Successor generations and the pious Predecessors.

Remembrance and Prayer: The Way of Prophet Muhammad, was one of the first works of Shaykh al Ghazali's to be translated into English. The book describes in vivid prose how the Prophet, upon him be peace, used to remember Allah and pray to Him. Not only are the exquisitely beautiful, deeply moving and penetrating words of the Prophet given in the English translation, but in the original Arabic as well, thus allowing those desirous of memorizing Arabic access to the original texts. The intimate relationship with Allah, which was the hallmark of the Prophet's life, becomes clear and vivid. The book's contents are immensely relevant. to the life and concerns of modern man, whose life has been made barren by the present secularist machinery.