Best-selling and award-winning author Margaret Peterson Haddix delivered an instant classic when she launched her Missing series. Two books ago, a plane landed with no pilot and no adults-and a passenger load of 36 infants. Years later, teens were shocked when clues began to turn up about just what it meant to be one of "the missing." Now young heroes Jonah and Katherine must help a girl return to the past amid a host of unexpected challenges.