I recommend you not buy it. The author is recitative. Its have some good quote like, "The formula for success is quite simple: double your rate of failure." Its mainly saying retrain the way of your work to get maximum advantage of your life. Yeah its good but not allowed in every conditions where you are near the goal.
There this principle not work. His message us good but examples are maladroit and repetitive . Its show trick to self help. Its can be summarize in few pages because main objective is take action towards your objective, (this type of writing its have), make plan, do it and then review it. Is it right? I don’t think so its right.