Jenkins weaves astrobiology, philosophy and theology into a rich tapestry that will be our vade-mecum for extra-terrestrial contact. The stakes are high, poised between being welcomed into the interstellar community and abandoning hope as we peer into abysses of solipsistic nihilism. The labyrinth remains unplumbed, but Jenkins will be our sure guide. (Simon Conway Morris, Emeritus Professor of Evolutionary Palaeobiology, University of...