* The Sikh Heritage: A Cultural and Religious History (2008)
* Sikhism: An Introduction (2008)
* The Sikh Diaspora: Migration and the Experience of Sikh Communities (2009)
* The Sikh Religion (2011)
* Sikhism and the Religious Imagination: A Philosophical Perspective (2012)
* Sikh Studies: A Select Bibliography (2013)
* Sikh Women and Gender: Exploring Multiple Voices (2015)
* Sikhism and the Environment: Perspectives from the Sikh Tradition (2016)
* Sikhism and Modernity (2018)
* Sikh Spirituality: A Guide to Sikh Religious Practice (2019)