One minute twins Jack and Mary are reading from an old book about their long line of twin ancestors—and the next they're standing in a village in 14th-century France! They have their 21st century minds, but they're in the bodies of their ancestors, Jacques and Marie. Almost at once, their "father" is kidnapped by a cult that worships a monstrous gargoyle, and the twins are plunged into deadly danger. With no time to spare, Jack, a sports hero, and Mary, a science whiz, pit their 21st century skills against the mysteries of the 14th. But even if they find a way to unmask the cult's hidden leader and rescue their father, the greater mysteries remain: Why are they in the 14th century, and How will they get back to the future? Look for more exciting time travel mystery and adventure with DNAgers Jack and Mary in The DNAgers: The Legend of Crossbones Key.