Themes: Mystery, Horse Ranch, Looking Into the Past, Ghosts, Haunted Objects. When Luna's team wins a trivia competition, she is the only one excited about the prize: a weekend at Stone Hills. Rumor has it that the old horse ranch is haunted. As she tries to piece together the ranch's past, Luna discovers a lot more than ghosts. 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.