I am a philosopher who works on metaphysics and on 17th Century philosophy. My general interest in the latter is the metaphysics of 17th Century philosophy and I am particularly interested in the metaphysics of Descartes, Locke and Leibniz. I am also interested in the methodology of the history of philosophy. My latest book is a monograph on Leibniz, Leibniz's Principle of Identity of Indiscernibles (OUP, 2014). For more details on my publications see my Faculty's webpage and my Academia.edu webpage.