The Academy of Nutrition and Dietetics Complete Food and Nutrition Guide . Often called the "gold standard" for advice across all life stages, it is highly accessible yet deeply researched.
These platforms offer peer-reviewed textbooks for free to ensure education is accessible to all: Nutrition Textbooks - Center for Open Education download nutrition textbook
Selection depends on your existing knowledge and goals. Below are the current gold-standard titles widely used in academia and clinical practice: The Academy of Nutrition and Dietetics Complete Food