Book excerpt: Billy Bishop is Canada's greatest air ace of all time. He was almost thrown out of military college for cheating, but he went on to become the most famous of the First World War fighter pilots. Though he became a darling of the press, Bishop grew tired of the carnage of the war. Author Dan McCaffery offers a lively, compelling portrait of Bishop. His meticulous research has settled, once and for all, the controversy over whether Bishop lied to win his Vicotria Cross. Warts and all, Bishop emerges as a true Canadian hero.