Ruby, Ned, and Mungo--Ruby's dog--go to a haunted hotel to meet Ruby's Great Aunt Hilda, but Hilda's invitation is a mystery and the reader must solve puzzles to help them find their way to the big Halloween party.
Ruby, Ned, and Mungo--Ruby's dog--go to a haunted hotel to meet Ruby's Great Aunt Hilda, but Hilda's invitation is a mystery and the reader must solve puzzles to help them find their way to the big Halloween party.
