True tales of justifiable self defense by good guys using knives and/or other sharp objects, something like the "Armed Citizen" pages in American Rifleman, but with more details and info. If these are rare, for filler use classic cases from the past couple of thousand years.
How an old man with a non-serrated Delica and some book learning fought off four punks with machetes, baseball bats, broken bottles, etc, and ended up with their girlfriends. Either that or true stories.8-)