The appearance of the Virgin Mary and her messages to the children - that she has come to beg the world to turn to God and save itself before it is too late - have attracted millions of pilgrims and massive publicity to this small village. Controversy has also built up. Are the children really visionaries, or are they liars as the local bishop accuses? Doctors, scientists, the Yugoslavian government, Rome - all have their own views. Mary Craig made several visits to Medjugorje and carried out extensive research. Her book is a masterly study of the 20th century's greatest happening, or possibly its greatest hoax.