Start with high-confidence food ingredients & labels books, then narrow by subgenre or adjacent topics.
Food Rules
Michael Pollan
What to Eat Now
Marion Nestle
Academy of Nutrition and Dietetics Complete Food and Nutrition Guide, 5th Ed
Roberta Duyff
The 150 Healthiest Foods on Earth, Revised Edition
Jonny Bowden
Real Food/fake Food
Larry Olmsted