Bob Hale has taught philosophy at the universities of Lancaster, St.Andrews, Glasgow, and most recently, Sheffield, where he is Professor of Metaphysics and Emeritus Professor in Philosophy. He is also currently a visiting professor at King's College, London, and an elected fellow of the Royal Society of Edinburgh. He works mostly in the philosophy of mathematics and logic, and has published extensively in both areas. Much of his work on mathematics has been done in collaboration with Crispin Wright, in defence of their neo-Fregean programme, which seeks to show that mathematical knowledge has its basis in our knowledge of logic. His work in philosophy of logic and metaphysics is focused on the nature and basis of logical and metaphysical necessity and possibility. Outside philosophy, he enjoys listening to music, looking at paintings and buildings, especially churches, going to the theatre, reading novels, and exploring cities and the countryside. He is married with three children and (so far) one grandson. He lives in London.