Muffle  (English, Paperback, Saini Aarchi)

This is an example how humans used fear to survive for such a long period. If you want to succeed, fear the outcome. The fear will drive to use all in your arsenal to ensure your win. This theory is even similar like Yerkes and Dodson law. Fear is the primal instinct of all lives, which can be used as a great weapon both for good and bad. In modern world, we shall use it for good.