Hi Ellis. I found the document by chance. It doesn't seem to be a book or a publication available anywhere else. It seems to be a compilation of quotes from old magazines which would not otherwise be read. The document says at the top:
These were assembled from O Sensei's memoirs printed in the Aikido magazine and other places. I pass them along because as people practice the art without contact with the founder they may miss much of what he imparted and his intention in teaching what he called ‘the art of peace.' In hopes that his teachings be remembered, please share these with all who study the art.
They are to be given for free to anyone interested [in] aikido or not.
It was on the cityaikido page which seems to be Robert Nadeau Sensei's dojo site. That's a pretty good endorsement.