The book is written in a clear and lucid style using a Plain English style without detracting from its substance. This is unusual but welcome for a theological book. It provides a short but incisive overview of 20 of the main 20C theologians providing biographical details as well as an outline of their ideas. It is a good way into the works of these theologians, so that one has an understanding of their overall thinking as well as their main works. To be commended.