Purification of the Heart ( Signs, Symptoms, And Cures of the Spiritual Diseases of the Heart ) in English Language Indian good printed quality by  Hamza Yusuf  
 
This book offers an insightful introduction to one of the most ancient of religions concerns: spiritual purification of the heart. It takes the reader through a well-known text from the Muslim tradition, and gives important commentary that relevant to our day and to people of a variety of religions experiences.