It is paradoxical that the most profound work being done today on the thought of Martin Luther is being done by Roman Catholics. The present work, by a young Jesuit, is an evaluation of the early spirituality of Luther as exemplified in his writings during the period 1509-1517 the lectures on the Psalms, on Romans, on Galatians, on Hebrews, on the Penitential Psalms, the sermons, etc. Luther, as he emerges from Wicks' analysis is still basically Catholic in orientation, but with the seeds of his future theological direction already evident in his exaggerated spiritual individualism and introspectiveness. Though, as Wicks is quick to point out, his spiritual writings are filled insights which are as valid in the twentieth century as they were in the sixteenth as the basis for reform and renewal. There is much in this work with which both Protestants and Catholics will disagree. Yet the author has examined the early writings of Luther with a thoroughness hitherto unparalleled, and his incisiveness and scrupulous objectivity will commend his book to scholars of all Christian churches.