Shaker Street residents are finding holes all over their yards. Are animals to blame? Are aliens?! Michael Liv and Leo - the Mysterious Makers of Shaker Street - decide to investigate what's behind all the destroyed landscapes. After gathering some clues the makers put their creativity and building know-how to work with a homemade metal detector. Will the makers' latest projects lead them to a space ship or a sinister neighbor? A glossary and reader questions provide support to the young reader and when the story's over readers can become a makers themselves by recreating the gadgets with instructions included at the end of the book.