An envelope of old photos, a late night email from a strange woman in Hanoi, a year that refused to be forgotten lured Doug Colligan back to Vietnam for a trip he never thought he would make. For a month he roamed Vietnam's Central Highlands looking for traces of his longago war. His travels took him to villages of jungle tribes, abandoned airstrips in the jungle, ghostly camps where the scars of war are still etched in the earth. Traveling only with Vietnamese and interacting only with Vietnamese he came to see the country and the people with new eyes. The 13th Month is part memoir, part travelogue, part history lesson for those who were not there.