A concise history of the "shot heard round the world"--and the dramatic day that began America's war for independence. Includes maps and photos.   When shots were fired at Lexington and Concord on a spring day in 1775, few, if any, fully grasped the impact they would ultimately have on the world.   This concise book offers not only a guide to the historical sites involved but a lively, readable history of the events, a culmination of years of unrest between those loyal to the British monarchy and those advocating for more autonomy and dreaming of independence from Great Britain. On the morning of April 19, Gen. Thomas Gage sent out a force of British soldiers under the command of Lt. Col. Francis Smith to confiscate, recapture, and destroy the military supplies gathered by the colonists and believed to be stored in the town of Concord. Due to the alacrity of men such as Dr. Joseph Warren, Paul Revere, and William Dawes, utilizing a network of signals and outriders, the countryside was well aware of the approaching British--setting the stage for the day's events.   From two historians, this is an outstanding introduction to a momentous battle, and the events that led up to it.