Throughout the hunt for the 39 Clues, Amy and Dan have encountered some of the darkest aspects of history . . . and had to deal with the role their family played. But are they ready for the truth? In this thrilling ninth installment, Amy and Dan hit the high seas as they follow the trail of some infamous ancestors to track down a long lost treasure. However, the real prize isn?t hidden in a chest. It's the discovery of the Madrigals' most dangerous secret and, even more shockingly, the true identity of the mysterious man in black.
●一場比「神鬼奇航」更驚險的奪寶行動！
●這怎麼可能？艾咪和丹沒權沒勢沒家人，為什麼卻能在「39條線索」的競賽中打敗強敵這麼多次？這個疑問直到艾咪和丹抵達加勒比海、遇到了「蛇銀環」的持有者之後，兩人才終於明白原來自己早已擁有解開謎團的關鍵鑰匙！
●一場比「神鬼奇航」更驚險的奪寶行動！
●這怎麼可能？艾咪和丹沒權沒勢沒家人，為什麼卻能在「39條線索」的競賽中打敗強敵這麼多次？這個疑問直到艾咪和丹抵達加勒比海、遇到了「蛇銀環」的持有者之後，兩人才終於明白原來自己早已擁有解開謎團的關鍵鑰匙！