In Darwin in 1942, Gunner's barking alerted an entire army base of impending air raids, well before the enemy planes appeared on radar. Following an ambush, Sarbi the explosive detection dog was held captive by the Taliban for over a year, before heading home a hero. And when 135000 horses left Australia for the First World War, why was General Bridges' charger Sandy the only one to return home? Drawing from first-hand sources and interviews with...