A. J. Ayer was also Wykeham Professor of Logic at Oxford University. His many distinguished books include Language, Truth and Logic, The Problems of Knowledge, The Concept of a Person and Other Essays, and works on Bertrand Russell and Thomas Paine. Jane Oa Grady studied Philosophy at University College, London. After teaching for some years she worked as a literary journalist, columnist and short--story writer. She has published a book of short stories and articles entitled Obsessions.