Baker Island is a quintessential Maine island, frozen in time. It was settled in 1806 by one family, and the island's population peaked at about two dozen people in five households at mid-century. The US government made use of the island's strategic location at the entrance to Frenchman's Bay with a lighthouse and military facilities. Wealthy, artistic, and academic summer visitors to the region--so-called rusticators--discovered its charm as a day...