On April 4th, 1968 a shot rang out in the Memphis sky bringing to a close the life of the last great American hero, the Reverend Martin Luther King, Jnr. Although known to most for the delivery of his 'I Have a Dream' address, which followed the peaceful march on Washington DC of 250,000 people, and as the youngest winner of the Nobel Peace Prize (at age thirty-five), King in his eleven years as elected president of the Southern Christian Leadership Conference, an organisation formed to provide new leadership to the then burgeoning civil rights movement, travelled over six million miles and spoke over twenty-five hundred times, appearing wherever there was injustice, protest, and action. Let the Trumpet Sound is the detailed examination of this life, written by Stephen B. Oates, winner of the Robert E Kennedy Memorial Book Award and the Christopher Award.