In 1810, Lucy Bluecrowne, twelve, is bored living ashore with her stepmother and half brother until two nefarious strangers identify her little brother as the pyrotechnical prodigy they need for their evil plan.
"Twelve-year-old Milo is stuck spending the winter holidays in a house full of strange guests who are not what they seem-again! He will have to work with friends old and new to uncover clues in search of a mysterious map and a famous smuggler's lost haul"--