- *Workout: Abs Bible: 37 Six-Pack Secrets For Weight Loss and Ripped Abs (Workout Routines, Workout Books, Workout Plan, Abs Workout, Abs Training) (Gym Bible Series) by Felix Harder. Price: Free. Genre: Ab Workouts, Sports, Reference, Sports Health & Safety. Rated: 4.7 stars on 36 Reviews. 102 pages. ASIN: B01BT87SEW.