Folding and refolding origami frogs, extracting the symmetrical veins from leaves, retreating to an imaginary world in his closet: after Teresa walked out the door one July afternoon in 1994, her son filled the void she left with a series of unusual rituals. Twenty-three years later, he lies in bed, reconstructing the events surrounding his mother's disappearance. Did she actually join the Zapatistas in the jungles of Chiapas, as he was led to...