With the help of Willbury Nibble QC, some friendly boxtrolls and cabbage-heads, Marjorie the frustrated inventor, and the rats and pirates from the Ratbridge Nautical Laundry, can Arthur thwart the Snatcher's evil plans to take over the world?
Ratbridge residents are clamouring for miracle medicine Black Jollop, but a shortage calls for action! The Nautical Laundry must journey afar to gather its secret ingredient.But things aren’t what they seem... and soon the ship is under attack. Can Arthur and his friends triumph and return to Ratbridge with a cure for all its ills? A fantastically funny tale of pirates, poison and monsters from bestselling author Alan Snow.