• Imam 'Ali: Concise History, Timeless Mystery (I.B. Tauris, 2022) ISBN 9781784539368
• Interpreting the 'Spirit of Assisi': Challenges to Interfaith Dialogue in a Pluralistic World (Vesuvius Press, 2013) ISBN 9781619562004 [contributor]
• The Spirit Of Tolerance in Islam (Bloomsbury Publishing, 2012) ISBN 9780857735270
• "Loving Compassion in Islam and Buddhism: Rahma and Karunā", Religions-Adyan, Issue 1, 2011 [contributed article]
• Common Ground Between Islam and Buddhism (Independent Publishing Group, 2010) ISBN 9781891785627 [contributor]
• The Sacred Foundations of Justice in Islam (World Wisdom, 2007) ISBN 978-1-933316-26-0
• The Underlying Religion: An Introduction to the Perennial Philosophy (World Wisdom, 2007) ISBN 978-1-933316-43-7 [contributed article]
• My Mercy Encompasses All: The Koran's Teachings on Compassion, Peace and Love (Shoemaker & Hoard, 2007) ISBN 978-1-59376-144-8
• Justice and Remembrance: Introducing the Spirituality of Imam Ali (I. B. Tauris, 2007) ISBN 978-1-84511-526-5
• Paths to Transcendence (World Wisdom, 2006) ISBN 978-0-941532-97-6
• Sufism: Love and Wisdom (World Wisdom, 2006) ISBN 978-0-941532-75-4 [contributed article]
• The Other in the Light of the One: The Universality of the Qur'an and Interfaith Dialogue (Islamic Texts Society, 2006) ISBN 978-1-903682-47-0
• Paths to the Heart (World Wisdom, 2004) ISBN 978-0-941532-43-3 [contributed article]
• Seeing God Everywhere: Essays on Nature and the Sacred (World Wisdom, 2004) ISBN 978-0-941532-42-6 [contributed article]
• Islam, Fundamentalism, and the Betrayal of Tradition (World Wisdom, 2004) ISBN 978-0-941532-60-0 [contributed article]
• Doctrines of Shi`i Islam: A Compendium of Imami Beliefs and Practices (I. B. Tauris, 2001) ISBN 978-1-86064-780-2
• Algeria: Revolution Revisited (Islamic World Report) (I. B. Tauris, 1998) ISBN 978-1-86064-368-2
• Avicenna (Heroes from the East) (Hood Hood Books Ltd, 1997) ISBN 978-1-900251-23-5
• Crisis In Chechnia (Islamic World Reports) (Isbs, 1996) ISBN 978-1-901230-00-0
• Bosnia (Islamic World Reports) (Isbs, 1996) ISBN 978-1-901230-01-7
• Turkey (Islamic World Reports) (Isbs, 1996) ISBN 978-1-901230-02-4

• Institute of Ismaili Studies
• Sufism
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Articles

• Defining Without Confining: reflections on a prophetic usage of sacred space
• Recollecting the Spirit of Jihad
• Eckhart’s Image of the Eye and the Wood: An analogy which explains ‘all that I have ever preached about’
• A Message of Hope at the Eleventh Hour: Martin Lings, 1909-2005