In the scheme of things, there aren't many copies of this book in existence. And as I said, there aren't likely to be any more printing runs of the book.
A pro-Conciliar villain (enriched no doubt by his willingness to be worldly, mingle with the world, and compromise in general) could easily buy 4 copies from one of the handful of online sellers of this book for a total cost of just $60 - $100, which would reduce the total number of this critically important book from 500 to 496 -- a drop of almost 1%.
Correct me if I'm wrong, Sean -- but I think you printed 500 total right?
But I bet the average layman assumes larger numbers and wider availability of this book (and other such books) than there actually is.
You, reading these words -- do you have a copy? Or know anyone in your family or circle of friends who does? If not, then I made my point. The book is basically rare. But it's also critically important for collating and then spreading the TRUTH about the SSPX, especially as it exists today. People need to know the truth.