Cambridge University Press, 1938* "Ethics and the History of Philosophy", London: Routledge, 1952; Reprint 2000, ISBN 0-415-22530-2* "Religion, Philosophy and Psychic Research", London: Routledge, 1953; Reprint 2000, ISBN 0-415-22558-2* "Human Personality and the Possibility of Its Survival.
Cambridge University Press, 1938* "Ethics and the History of Philosophy", London: Routledge, 1952; Reprint 2000, ISBN 0-415-22530-2* "Religion, Philosophy and Psychic Research", London: Routledge, 1953; Reprint 2000, ISBN 0-415-22558-2* "Human Personality and the Possibility of Its Survival.