The Immaculate Heart: The true story of Our Lady of Fatima;

Father de Marchi spent hours and days researching for this book on location. He spoke at length to many witnesses including Ti Marto, the father of Jacinta and Francisco, as well as with Maria Carreira, one of the most important witnesses who first came to the Cova da Iria for the apparition of June 13, 1917. Most of the witnesses he interviewed are now dead. This book is a classic of Fatima literature. Over three million copies have been printed in English alone since it was first written.