When World War I breaks out, the adventurous New York heiress, Victoria, is prevented from taking part because she is married. So she changes places with her lookalike sister, Olivia, who is a homely type. Everything works, until Olivia falls in love.

"In the masterful follow-up to the runaway hit All the Missing Girls--a "fiendishly plotted thriller" (Publishers Weekly)--a journalist sets out to find a missing friend, a friend who may never have existed at all. Confronted by a restraining order and the threat of a lawsuit, failed journalist Leah Stevens needs to get out of Boston when she runs into an old friend, Emmy Grey, who has just left a troubled relationship. Emmy proposes they move to...