Anyone visiting the innumerable islands that hug the coast of Maine has wondered what it would be like to live year round on a "rock" bounded by the sea, essentially cut off from the world, with life's priorities whittled down to the most basic necessities. In 1949 Art and Nan Kellam set off to find their own isolated piece of paradise and eventually settled on a 550-acre island known as Placentia, near Mount Desert Island. They would live there year...