Luminous at dawn and dusk, the Mekong is a river road, a vibrant artery that defines a vast and fascinating region. Here, along the world's tenth largest river, which rises in Tibet and joins the sea in Vietnam, traditions mingle and exquisite food prevails. Award-winning authors Jeffrey Alford and Naomi Duguid followed the river south, as it flows through the mountain gorges of southern China, to Burma and into Laos and Thailand. For a while the...