Joe definitely marches to his own drum, and it can be frustrating to interact with him.

His writing "style" is not (for better or worse) what we are accustomed to, and the photo quality is not what it could have been.

BUT, that said, his work is thought-provoking, corrects some errors/omissions in Mallory/Brophy, and particularly Poyer - and, in my opinion, any serious Krag collector would be well-advised to spend the $40.