Gatehouse Code

When thirteen‑year‑old Tessa Hartford steps into the abandoned stone gatehouse on the edge of the Hartford Eco‑Mansion, she expects dust, crooked shelves, and a perfect place to build a summer clubhouse. She does not expect her six‑year‑old brother to uncover a diamond buried beneath the floor—one that looks suspiciously like the jewels stolen in a string of Hudson Valley heists.With new staff arr...