Shaker Street residents are finding holes all over their gardens.

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 neighbour?

A glossary and reader questions provide support to the young reader, and when the story's over, readers can become makers themselves by re-creating the gadgets with instructions included at the end of the book.