This book was written in 1949 following a personal visit of some months to Fatima to visit the locations and to personally interview Sr. Lucia. Its description of the apparitions and children are the most complete of any of the many books on Fatima. Dr. von Peters has edited the work, put it into more modern American English, and added a number of additional materials including a Timeline of the Third Secret, what happened to Sr. Lucia and her travails with the hierarchy, both before and after the Fatima apparition was recognized by the Church, the Errors of Russia, and others. It is a fast moving book, reading almost like fiction due to Dr. Walsh's great story telling ability. If you wondered what all the to do was about Fatima, this is the book for you.