When Sukey Forbes lost her six-year-old daughter, Charlotte, to a rare genetic disorder, her life felt as if it were shattered forever. Descended from two distinguished New England families, Forbes was raised in a rarefied-if eccentric-life of privilege. Yet Forbes's family history is also rich with spiritual seekers, including her great-great-great-grandfather Ralph Waldo Emerson. On the family's private island enclave off Cape Cod, apparitions have always been as common as the servants who once walked the back halls. But the "afterlife" took on new meaning once Forbes dipped into the world...