I will make no secret that C.S. Lewis is one of the most influential Christians I have known. And yes, I know him through his books! His clear and lucid writing have helped shape my Christian thinking, so I eagerly read and study every book I can get that he has written. This book is a very special "find", and unusual in many regards. The first and most unusual aspect is that it is written in Latin! The English translation is on the other side, so this is rather like a diglot book.The Roman Catholic priest, Father Giovanni Calabria read C. S. Lewis' book, "The Screwtape Letters" in 1947 and wanted to write Lewis. Being Italian and knowing no English and figuring rightly that Lewis knew no Italian, Father Calabria banked on Lewis' classicist background and boldly wrote him in Latin. Lewis answered each and every letter also in Latin. The ongoing correspondence is very kind and loving between these two Christians. Father Calabria hoped that Lewis would use his influence in the Protestant world to help repair the division between Christians. Lewis agreed that the division among Christians was grievous yet he was only a layman, and not a theologian, so he felt his influence in that regard was limited.But the ongoing correspondence has a very loving and even playful aspect to it. These men, both Christians, agreed to pray together about many things, including the division among Christians.I recommend this book highly. There are only a few of Father Calabria's letters, so Lewis' letters make up the majority of the book. And if you want to practice your Latin translation I think this would be a very worthwhile book to do that with!