Resilience: Hard-Won Wisdom for Living a Better LifeNEW YORK TIMES BESTSELLER A masterpiece of warrior wisdom: how to be resilient, how to overcome obstacles not by "positive thinking" or self esteem, but by positive action. The best selling author, Navy SEAL, and humanitarian Eric Greitens offers a self help book unlike any other. In 2012, Eric Greitens unexpectedly heard from a former SEAL comrade, a brother in arms he hadnt seen in a decade. Zach Walker had been one of the toughest of the tough. But