"Half Moon Investigations" is a children's book written by Eoin Colfer. It follows the story of a young detective named Fletcher Moon, who is known for his keen observation skills and knack for solving mysteries. Set in a small town, Fletcher takes on various cases, often involving his classmates and local residents. The book combines elements of humor and adventure, making it engaging for young readers. Fletcher's character is relatable, as he navigates the challenges of being a teenager while pursuing his passion for detective work. The story emphasizes themes of friendship, perseverance, and the importance of believing in oneself.