Terrill Hoffman operates Terrill Hoffman Photography and moderates Knifeforums.com. His writings covering both knives and firearms frequently appear in Harris Outdoor Magazines' various publications. He contributed chapters 2, 8, 9, 14, and 15 for Armed & Smart.
Paul Markel is the host of Sportsman Channel's series Student of the Gun and operates Student of the Gun University training program. He has extensive military and law enforcement experience and now spends much of his time writing about firearm techniques and safety for various publications. He contributed chapters 1, 4, 6, 10, and 12 for Armed & Smart.