Start with high-confidence southwest gardening books, then narrow by subgenre or adjacent topics.
Desert Survival Skills
David Alloway
The Florida Lawn Handbook
Laurie E. Trenholm
Desert Landscaping
George Brookbank
Dry Gardens
Daniel Nolan
The Colorado Gardener's Companion
Jodi Torpey
Native Plants for Florida Gardens
Stacey Matrazzo, Nancy Bissett
The Art of South Florida Gardening
Harold Songdahl, Coralee Leon
Mesquite
Gary Paul Nabhan
Growing Vegetables in Drought, Desert, and Dry Times
Maureen Gilmer
Cacti
Terry Hewitt
Cacti and Succulents
Graham Charles
Successful Gardening in Utah
Caleb Warnock