"Thick as sand fleas and twice as pesky." That's what Willy Potts' father said about summerfolk. They sprawled over most of the beach and left half-eaten peanut butter sandwiches in the sand.

So every summer Joe Potts would go off to fish for cod and Willy headed for the swamp and his leaky old boat to snooze and fish and enjoy the solitude.

But on the longest day of summer this year, Fedderly appeared at his boat and asked Willy to meet his friends and to join their flotilla. Willy was off on an unusual adventure which made him decide that some summerfolk weren't so bad after all. From the publisher's summary