Creating a comprehensive and modern textbook list for natural bodybuilding, as well as related fitness subjects, requires careful consideration of various facets of exercise science, nutrition, psychology, and health. Here is a list that includes key textbooks across these domains:
### Exercise Science and Physiology
1. **"Essentials of Exercise Physiology"** by William D. McArdle, Frank I. Katch, and Victor L. Katch
2. **"Exercise Physiology: