Every year folks hop in their cars and drive to all four corners of the United States and beyond, be it on holiday, to visit family or anything in between. Unfortunately for many responsibly armed citizens, this can mean exposing themselves to an arcane tangle of state gun laws and reciprocities, many of which change seemingly on a whim from year to year. Fortunately, the annually updated 22nd edition of J. Scott Kappas’ "Traveler’s Guide to the Firearms Laws of the Fifty States"has America’s gun-toting travelers covered, with more than 100 updates since 2018, including 50 new subheads in each state’s checklist detailing ammo-carry rules, and new online updates for conditional reciprocity states. As many avid hunters and travelers also visit the nation’s northern and southern neighbors, the "Traveler’s Guide" includes detailed information for trips to Canada and Mexico. The guide retails for $14.95 (including shipping), and can be purchased at gunlawguide.com.