The Quaestiones Disputatae de Veritata constitutes Aquinas"s most extended treatment of any single topic. Volume I (questions 1-9), translated by Robert W. Mulligan, S. J., discusses the nature of truth and divine and angelic intellects. Volume II (questions 10-20), translated by James V. McGlynn, S. J., deals with truth and human intellect. Volume III (questions 21-29), translated by Robert W. Schmidt, S. J., investigates the operation of the will.