I'll nominate Unbroken: A World War II Story of Survival, Resilience, and Redemption by Laura Hillenbrand.
Amazon Best Books of the Month, November 2010: From Laura Hillenbrand, the bestselling author of Seabiscuit, comes Unbroken, the inspiring true story of a man who lived through a series of catastrophes almost too incredible to be believed. In evocative, immediate descriptions, Hillenbrand unfurls the story of Louie Zamperini--a juvenile delinquent-turned-Olympic runner-turned-Army hero. During a routine search mission over the Pacific, Louie’s plane crashed into the ocean, and what happened to him over the next three years of his life is a story that will keep you glued to the pages, eagerly awaiting the next turn in the story and fearing it at the same time. You’ll cheer for the man who somehow maintained his selfhood and humanity despite the monumental degradations he suffered, and you’ll want to share this book with everyone you know. --Juliet Disparte
I usually don't read non-fiction, but I'll give this a read if it wins.