If you have some patience in reading from a different perspective, I would highly recommend 5MadFarmer's Krag book which holds a valuable place all its own in the Krag collecting world. He brings a different style of writing to the collector's place but has tremendously documented details about the different Krags and changes and historical significance of the development of this fantastic firearm. It is significantly underpriced for its value.

His contact is:

5madfarmers@gmail.com