For over a decade, syndicated columnist Rheta Grimsley Johnson has been spending several months a year in Southwest Louisiana, deep in the heart of Cajun Country. Unlike many other writers who have parachuted into the swampy paradise for a few days or weeks, Rheta fell in love with the place, bought a second home and set in planting doomed azaleas and deep roots. She has found an assortment of beautiful people in a homely little town called Henderson,...