In Robin Jensen’s powerful, wide-ranging presentation, the central image of Christianity turns out to be an image of almost unimaginable complexity: a cosmic abstraction, a grim portrait of cruel suffering, a gem-studded token of triumphant authority, an idol to be smashed, a relic to be kissed, a charm to emboss on a Crusader’s shield, a tree of life, a paradoxical mystery. Jensen has searched out a vast and beautifully chosen variety of crosses, from Golgotha to Ground Zero, along with songs, poems, and long-lost rituals, to bring us a moving study of faith, both Christian and non-Christian, in its infinite variety.