There is a very big rock on Grandpa's beach. How did it get there? And why does it keep disappearing?

In this charmingly illustrated book, a giant rock is the main character, taking us through the seasons of the Maine coast. Full of lovely, simple details of animals and plants-and the seaside adventures of grandchildren who come to visit each summer-the rock's story is set against the rhythm of the tides and the great expanse of the ocean.