Cynthia Riggs, a tall gray-haired and imposing figure, is a 13th generation Islander, the mother of five and daughter of author and poet Dionis Coffin Riggs and school principal and printmaker Sidney N. Riggs. With a degree in geology, her own remarkable resumé — writing for the National Geographic Society and Smithsonian (she spent two months in Antarctica), working in public relations for the American Petroleum Institute, operating boat charters (she lived on a 44-foot houseboat for 12 years), running the Chesapeake Bay Ferry Boat Company, and being a rigger at Martha's Vineyard Shipyard. After enrolling six years ago in the Master of Fine Arts creative writing program at Vermont College, Riggs found yet another calling. She has become a successful mystery writer. All her mysteries take place on the Vineyard, and all draw from local scenes and fictionalized composites of Island characters. She knows them all well, having been a two-time candidate for West Tisbury selectman ("No, I don't think I'll do that again"), a commissioner on the Martha's Vineyard Commission, a member of what is now the Martha's Vineyard Arts Council, and an active Island voice in both politics and human rights causes.