He is also the father of Elijah, a son who is on the autistic spectrum. Combining drawings, notes and objects made by Elijah, Echolilia is a collaborative book project in which Archibald and his son photograph the experience of seeing the world differently. It is thoughtful, personal work that evolved over time. It is emotional at times but also deeply perceptive, a retort to the idea that everything in photography has been done, a sign of how powerful photography can be and how visual communication can reach beyond the customary photographic audiences.