Ludwig Olson left us all a legacy.
As an alternative, I would sniff around Firearms News' website and see if they have a PDF of their Mauser compendium. Bunch of articles about Mauser this, Mauser that, sporterizing, kloodging, tons of good stuff. I have a hard print copy stashed (memorized all of it) and can't tell you the title, but it was worth getting. Didn't get so much into the "fine" Mausers as it did milsurps, but it's useful.
