The Little Android

Meyer takes the bones of The Little Mermaid and rebuilds them with circuits and chrome, and it works beautifully. Mech6.0 developing feelings she was never programmed for is genuinely moving, and Meyer doesn't take the easy Disney route — this follows the original Andersen tale to its devastating conclusion. It's a standalone companion that works even if you haven't read the main series, though Lunar Chronicles fans will appreciate the world-building texture. A gorgeous little heartbreak of a story.