Start with high-confidence low carb cooking books, then narrow by subgenre or adjacent topics.
The Blood Sugar Solution 10-day Detox Diet Cookbook
Mark Hyman M.D., Mark Hyman
The Galveston Diet
Mary Claire Haver MD, Mary Claire Haver
The Heal Your Gut Cookbook
Hilary Boynton, Mary G. Brackett
How Not to Get Sick
Benjamin Bikman, Diana Keuilian
The Obesity Code Cookbook
Dr. Jason Fung, Jason Fung