I have just finished reading this book after several anti-opus dei books. Messori's annalysis is both reasonable and deep. I have read many criticisms of the work by people who look at things from a purely human way. This book tries to objectively annalyse Opus Dei without losing sight of the spiritual-outlook necessary. Sacrifice, from a purely human outlook, is the most ridiculous thing on earth. But from a Christian spiritual outlook, it is a supreme act of Love. Messori tries to explain Opus Dei humanly but realises that some aspects of "The Work" are simply Christian/Catholic. If you are not "a believer" it is natural for you to find some things scandalous (ie. the ciclice) & difficult to understand. He does not avoid any criticisms but deals with them one by one.