RelBib: Gavin Picken. Spiritual Purification in Islam: The Life and Works of al-Muḥāsibī. Routledge Sufi Series, vol. 11. New York: Routledge, 2011. xii 248 pages, appendices, bibliography, index. Cloth. ISBN: 978-0-415-54822-9. US $130.00.

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