As I work on my own piece about the late Karl Edward Wagner and his character, Kane, what comes along in Black Gate but an article about "Dark Crusade". It's not simply a review but an examination of the why swords and sorcery has been shunted to the sidelines by the doorstopping series that have come to dominate the fantasy market.
I think the author, Brian Murphy, keys in on several good reasons for S & S's displacement in the marketplace. The commenters bring up several good additional points.
The Kane novels are good and "Dark Crusade" is the best. However, for the best of Kane get the short stories. They're all together in "Midnight Sun" from Night Shade Books. If that's expensive for you you can get the best in "Death Angel's Shadow" and "Night Winds" for a lot less. And with classic, if not quite accurate, Frazetta covers.