Ahoy there, landlubbers! Join Jim Lad, Matilda, and the Jolley-Rogers as they attempt to rescue the children from the piper in their swashbuckling fourth adventure. One morning the residents of Dull-on-Sea wake up to find their town is overrun -- with rats! Big rats, small rats, fierce rats, hungry rats . It's an infestation! Just when everyone is at their wits' end, a nautical stranger who plays the pipe turns up and offers to get rid of the rodent problem for a fee. But once the rats are gone, the greedy mayor of Dull-on-Sea refuses to pay -- so the Pirate Piper plays an enchanted tune and leads the children away. Can Jim, Matilda, and Nugget save their friends?.