Margaret Mahy and Steven Kellog, two the world's most beloved picture book creators, are reunited for this galloping, free-spirited romp. It begins with Sammy, whose obnoxious neighbors get to go to the beach in their brand new boat, while he has to get clean for a visit from grandma. Worse, it's a bath in the strange tub his dad just bought at a tag sale! But the magic of the tub soon has Sammy roaring out to sea, befriending a giant sea serpent, conquering pirates in a huge soapy battle, and returning home with the greatest of treasures. Bath time will never be the same! (Plus Grandma's got surprises of her own!)