Start with high-confidence southwestern cooking books, then narrow by subgenre or adjacent topics.
The Prophets of Smoked Meat
Daniel Vaughn
Being Texan
Editors of Texas Monthly, Texas Monthly
The Western Junior League Cookbook
Ann Seranne
Arnietex
Arnie Segovia
The Cowgirl's Cookbook
Jill Charlotte Stanford
Healthy Southwestern Cooking
Bob Wiseman
American Western Cooking
Robert McGrath
Texas BBQ
Veronica Meewes
Texas BBQ, Small Town to Downtown
Wyatt McSpadden
End of the Trail Eats
Natalie Bright
Foods of the Southwest Indian Nations
Lois Ellen Frank
Franklin Barbecue
Aaron Franklin, Jordan Mackay