I thought this was strong  end to the series. I wish I would have re-read book 1 and book 2 because the book 3 had so many tie backs that sometimes when over my head. But I really did love the story. I just love the four main characters and how much they bonded through this experience and how much they really became family and created a found family. This book really explored the past of all four characters in this novel. I just love how complex this mystery was and how imperative the kids abilities help make this case be solved.  The end of this series makes me want to re-read the series again.