Start with high-confidence southern cooking books, then narrow by subgenre or adjacent topics.
S Is for Southern
Editors of Garden and Gun, David DiBenedetto
The Potlikker Papers
John T. Edge
House of Smoke
Betty Crocker the Big Book of Cakes
Betty Crocker
The Truth About Baked Beans
Meg Muckenhoupt
The Everything Restaurant Copycat Recipes Cookbook
Kelly Jaggers
Beard on Food
James Beard, Mark Bittman
Food for Thought
Alton Brown
The Complete Cooking for Two Cookbook, 10th Anniversary Edition
America's Test Kitchen, America's Test Kitchen