Nathan asked. Daryl nodded. “At least that’s what the computer says.” “Then we’d better figure out how to use the mirror to get to Earth Yellow. Finding my father is still priority one.” Nathan’s mother pressed the violin under her chin. “I’ll try ‘Foundation’s Key.’ That seems to unlock a lot of puzzles. At least it might let us see something we need to know.” He pointed the mirror at his mother. “Do you remember all of it?” “I played it about fifty times back on Earth Blue. I’d better know it.” After quickly tuning the violin again, she began playing. Nathan shifted his body, using one hand to point the mirror at himself, Daryl, and his mother. In the flashlight’s narrow beam, only his mother’s face and hands showed in the mirror’s image. Her left hand, still wrapped in a strip of Nathan’s sweatshirt, trembled. The reflection darkened for a moment before glowing with a soft yellow light. Amber’s face appeared against a background of darkness.
