In reading order
Gym Bible
Felix Harder
Arm Bible: 39 Best Workouts
Felix Harder
Abs Bible: 37 Six-Pack Secrets for Weight Loss and Ripped Abs
Felix Harder
Bodyweight Bible: 44 Best Exercises
Felix Harder
15-Minute Effective Home Workouts
Felix Harder
Workout: 80/20 Workout
Felix Harder
Bodybuilding: The Hardgainer Transformation
Felix Harder