Of all the audio book apps and providers I have tried, Audible is the best by far. They have a great app catering for quick controls, handy settings like sleep timer and button free controls. Bookmark, annotate, speed setting and a widget to place on your screen, I really can't ask for more as a listener. The audio quality is impeccable and the choice of books available is amazing. I never fail to find the book I am looking for. You have saved my commute.