Amy and Dan have become quite suspicious of their au pair, Nellie. While traveling to the Caribbean for the next part of the hunt, they force Nellie into telling them the truth about her secret conversations. As much as it pains Nellie, she only tells them part of it. She's been working for Mr. McIntyre because Grace hired her. Grace wanted to be sure Amy and Dan could take part in the hunt, as they needed a chaperon. All this time, Nellie's been reporting back to Mr. McIntyre.
Amy and Dan can't believe what they're hearing. How could they have trusted her? Now, they realize that they can't trust anybody, except themselves.
While in Jamaica, they find a significant piece of a clue. With a little bit of research, they uncover knowledge of pirates with Cahill loot. Directly after their research find, Nellie's forced to visit a woman who wants to speak with her. Nellie and her charges are in for a shock. Grace influenced her life in ways she never imagined - more than just hand-picking her as Amy and Dan's au pair.
With this new knowledge, will Amy and Dan trust Nellie again? They're running out of people to trust, and as they get closer to the truth behind the 39 clues, the danger keeps escalating. Without her help, they might end up dead, but would trusting her be more dangerous?
I love this series. These are quick, engaging reads that I devour. I can't wait for the next book to see how this series ends; it's been an amazing ride. I love all the action, the danger, the many double-crossings, and watching the sibling relationship unfold.
Reviewed by: Jennifer Rummel