.
For him to have generated this volume in one short year, and get it into print, it would seem he had to write just about relentlessly, and even without having to do any research, but "off the top of his head."
But the book doesn't read like it is impromptu. Compare the content and intelligence of this book to say, the sermons and conference talks of Bishop Fellay and Fr. Rostand and Fr. Themann.
It's a different universe.
.