This is a fast-paced mystery with just the right amount of character development and literary heart, told in alternating voices of two teenagers living a world apart. Rosie lives in England under the shadow of her older sister, who went missing when she was just a baby. Anna lives in Florida, the only child of a reclusive and religious mother who was widowed when Anna’s father was killed in a car accident. When Anna receives an unmarked package from a stranger, dangerous questions start to rise. Meanwhile, an ocean away, Rosie reads an email that was never meant for her. Each of the girls separately follows her path as the plot moves toward a thrilling conclusion. - S.M.C.