Arrow, a young boy who lives in Seattle, goes on an adventure to visit his grandfather in Alaska aboard Aunt Kelly's salmon boat, spends time with Grampy on his float house, then returns to Seattle with Grampy on a friend's seaplane.

Award-winning duo Kate Messner and Christopher Silas Neal return in this latest addition to the Over and Under picture book series, this time exploring the rich, interconnected ecosystem of the ocean! Over the waves, the sea lions bark and seagulls wheel and call. The bay is smooth and bright in the sun. But under the waves, there's a whole hidden forest, full of whales and wolf eels, sardines and sea bass, leopard sharks and luminous jellies, as...