Themes: Mystery, Ghosts, Small towns, History, Looking Into the Past. The Garza family has just bought a big, old house in a small Ohio town. While helping her mom fix it up, Luna finds a mysterious metal box under the floorboards. This discovery gives her glimpses of the house's past and may hold the key to her family's future there. Mysteries seem to find Luna Garza, a tween growing up in small-town Ohio. Luna can't help but get pulled into solving them. Middle school readers will love following Luna as she digs into the puzzling occurrences that arise during her everyday life in an all-American town. Each book is approximately 100 pages.