The most recent addition to The Mandel Lectures in the Humanities at Brandeis University series, Prof. Langston brings her readers a profound message of both warning and encouragement to action, of the potential for tragedy and the potential for renewal. While what has already happened cannot be changed, what happens next can be; but to act wisely, an understanding of these species in and of themselves as well as their existence in their environment must be achieved. Climate Ghosts is clearly a step towards such knowledge.