If you're looking for a simple category to put Marc MacYoung into, don't waste your time.
Yes, he was a pioneer in the self-defense world. Yes, he developed the Five Stages of Violent Crime (http://www.nononsenseselfdefense.com) and is a court recognized expert witness (http://marcmacyoung.com). Yes he developed Conflict Communications, a de-escalation and conflict resolution program with Rory Miller. Yes he was a thug with the street name "Animal." Yes, he teaches police, military and martial artists around the world. And yes, he's also the author of fiction. One day he'll be talking to a bum in an alley and the next he'll be lecturing at universities or on TV. You'll find him digging ditches and working cattle at his in-laws ranch one day and being consulted by Ph.Ds, lawyers and millionaires the next.
Also Amazon doesn't allow DVDs to be listed on Author pages, but don't forget Street Safe
(Five Stages of Violent Crime)
And Surviving a Street Knife Attack