- 2023. Role of Wonder in Creating Identity, The. Todd Lawson. — The term badi', "wondrous" or "new," is used dozens of times by the Bab in his proclamatory work the...
- 2017. La réfutation des mythes: Les théories du complot en Iran sur l'origine et les objectifs de la religion bahá'íe. Adib Masumian, Pierre Spierckel, trans. . — French translation of "Debunking the Myths: Conspiracy Theories on the Genesis and Mission of the Ba...
- 2017. Nietzsche et les écrits bahá'ís: Une première approche. Ian Kluge, Pierre Spierckel, trans. . — Translation of "Nietzsche and the Bahá'í Writings: A First Look."
- 2015. Preuves bahá'íes basées sur le Coran. Pierre Spierckel. — Expose la compréhension baha'ie des versets du Coran qui traitent de Sceau des prophètes, de Jour ...
- 2013. La Raison dans les Ecrits baha'is: Son importance, sa fonction, son usage. Ian Kluge, Pierre Spierckel, trans. . — French translation of "Reason and the Baha'i Writings."
- 1993. L'islam, religion éternelle?: une approche bahá'íe de la revendication à la complétude. Seena Fazel, Khazeh Fananapazir, Pierre Spierckel, trans. . — French translation of "A Baha'i Approach to the Claim of Finality in Islam."
- 1992/2017. Bicentenaire de Bahá'u'lláh. Bahá'í International Community. — French translation of the Baha'i International Community's 1992 Statement on Baha'u'llah, updated fo...
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