Kimberley C. Patton has compiled a treasure-trove of humanity’s experience of and insight into the cosmic significance of twinning/doubling. Through the expert analysis of twenty contributors on topics in material culture, ritual, mythology, and lived experience, Gemini and the Sacred offers the wisdom of the world’s great civilizations on the meaning of the cosmos, human nature, and identity. A must-read for all interested in the productive—but ambiguous—tension of sameness and difference fundamental to so much of our world.