Allan Savage seeks to facilitate access to some of the most progressive thoughts and debates that have been expressed within the Roman Catholic Church. The Twentieth Century Encyclopedia of Catholicism (edited by Christopher Hollis and published by Hawthorn Books, New York, 1966) is composed of scholarly publications of prominent Catholic theologians of the 1950's. Many of these articles were discussed during the Second Vatican Council which was convened by Pope John XXIII and held from October, 1962 until August, 1965. However, the encyclopedia of 150 volumes covers topics ranging from the meaning of faith and the nature of mysticism to cosmology and sexual morality. The sheer volume of subjects treated and positions taken may discourage the new scholar who faces laborious searches through the two volume index of the encyclopedia.