To bring together in one volume an unbiased evaluation of the major contemporary theologians is a service of exceptional value to all students who are trying to improve their depth of perception and also maintain their balance in the world of competing points of view. Dr. John B. Cobb, Jr., Associate Professor of Systematic Theology at Southern California School of Theology, at Claremont, California, has brought together ten of the major theologians who are exerting major influence, and deals with each both as expositor and critic. Dr. Cobb divides these ten into three groups. The first includes E. L. Mascall, L. Harold de Wolf, and Henry Nelson Wieman, who assign a positive role to reason. Emil Brunner and Karl Barth exemplify the next group, which denies any systematic dependence of theology on the prior conclusions of reason. The third group includes Rudolph Bultmann, Paul Tillich, H. Richard Niebuhr and Reinhold Niebuhr. These all have obvious differences from each other but are alike in that they relate themselves positively to modern existentialist analyses. No book for casual reading, the serious student will find it invaluable as he seeks to align his own thinking with the master, or masters, whose method of thought most appeals to him.