It was not a question. I do appreciate your advice - however I don’t believe you got the context of my statement. I love riding mountain bike and I enjoy being fast but racing is not my primary goal (I do occasionally race in the southeast TN, NC, etc). I have always practiced cross training in order to keep hips and hamstrings loose, keep some strength, etc. Recently I have become more interested in adding an element to my cross training that would also benefit the cardio systems. Example…high intensity bodyweight routines, crossfit style workouts, etc. However…after checking the price on the above book at amazon I have decided to pass. I read a lot of books and I don’t ever intend to pay $47 for one.