What is the summary of the book the spoon in the bathroom wall?

"The Spoon in the Bathroom Wall" is a mystery novel by Tony Johnston. The story follows a young girl named Lily who discovers a mysterious spoon hidden in the bathroom wall of her new home. As Lily investigates the origins of the spoon, she uncovers secrets about the previous owner of the house and ultimately solves a long-standing mystery. The book explores themes of curiOSity, perseverance, and the power of discovery.