Prof. Pruss holds PhD degrees in both mathematics and philosophy. In addition to many peer-reviewed articles, his publications include the following academic monographs: Infinity, Causation and Paradox (OUP 2018), Necessary Existence, (with with Joshua Rasmussen, OUP 2018), One Body: An Essay in Christian Sexual Ethics (Notre Dame 2012), Actuality, Possibility and Worlds (Continuum 2011), The Principle of Sufficient Reason: A Reassessment (CUP 2006).