Start with high-confidence barbecue & grilling books, then narrow by subgenre or adjacent topics.
The Prophets of Smoked Meat
Daniel Vaughn
A Taste of Cowboy
Kent Rollins, Shannon Rollins
Arnietex
Arnie Segovia
Texas BBQ
Veronica Meewes
Texas BBQ, Small Town to Downtown
Wyatt McSpadden
Franklin Barbecue
Aaron Franklin, Jordan Mackay