An insider's sometimes shocking account of how Defense Secretary James Mattis led the US military through global challenges while serving as a crucial check on the Trump Administration.For nearly two years as Trump's Secretary of Defense, General James Mattis maintained a complicated relationship with the President. A lifelong Marine widely considered to be one of America's greatest generals, Mattis was committed to keeping America safe. Yet he served a President whose actions were frequently unpredictable and impulsive with far-reaching consequences.Often described as the administration's "adult in the room," Mattis has said very little about his difficult role, and since his resignation has kept his views of the President and his policies private. Now, Mattis's former chief speechwriter and communications director, Guy Snodgrass, brings readers behind that curtain. Drawing on meticulous notes from his seventeen months working with Mattis, Snodgrass reveals how one of the nation's greatest generals walked a political tightrope while leading the world's most powerful military.