Frankie Banister and his family are planning a huge party for Granddad Abraham’s 175th birthday — made even more exciting now that Abe’s ghost has appeared!
He reveals a long-lost underwater wing of the hotel, perfect for a celebration in the BRINY BALLROOM. But down in the deep, something strange is stirring… sea monsters, secrets, and a ghost with a mystery of his own. Is Granddad Abe really who he seems? Or is something fishy going on? (Book 3)