I've got his book 'The Book Of The Twenty Twos'. Well written and a good retrospective, as well.
Sam has a world of knowledge, and writes clearly.
But I suspect he could have done better in gun-writing if he'd worked harder on photography--which was already becoming far more important when I started out in the business in the 1980s. Gun (and hunting and fishing) magazines of the era expected writers to also include photos--and many still do.
However, back then most gun magazines used only black-and-white photos, and the B&W film of the day was more "contrasty" than color slides--which not long afterward became the industry standard, even when many were converted to color for publication.
As a result quite a few writers back then developed their own B&W photos, so could compensate for exposure problems. But apparently Sam never did, and lot of his photos had really dark shadows--especially across his face, under his hat. And sometimes it affected his technical photos as well.
