Ian Logan gained a first class honours degree in Theology from the University of Leeds. He was awarded a DAAD scholarship and undertook post-graduate study at both the LMU and the Philosophische Hochschule in Munich. He obtained his doctorate on Karl Rahner and Anselm of Canterbury from the University of Leeds. He is currently Senior Research Fellow and Tutor in Medieval Philosophy at Blackfriars Hall, Oxford University. He has published articles on Anselm in New Blackfriars and the Saint Anselm Journal. Forthcoming articles include: an article on the development of Ms Bodley 271 in G. Gasper & H. Kohlenberger (eds), Anselm and Abelard: Investigations and Juxtapositions, being published by PIMS (2006); 'Whatever happened to Kant's ontological argument?' in Philosophy and Phenomenological Research (2007); 'Whoever understands this: On translating the Proslogion' in New Blackfriars (2008).

Contents: Introduction; The pre-text: the dialectical origins of Anselm's argument; The text; Commentary on the Proslogion; Anselm's defence and the Unum Argumentum; The medieval reception; The modern reception; Anselm's argument today; Conclusion: the significance of Anselm's argument; Bibliography; Index.