"In order to accept the enormous responsibility that comes of being in the world, we must first conceive, in spite of all the obstacles, the state of actually being the world." It is for this reason that John R. Campbell came to the Klamath marshes, a wetland in southern Oregon formed by three ancient, shallow lakes.Absence and Light is Campbell's account of his exploration of the marshes and a meditation on the world he found there, on his...