As I've mentioned before, this is going to be an excellent series. I read the first book, The Maze Of Bones, and received and read One False Note, the second book.
Before the release of One False Note, on the 1st of December, there was a webcast which can be viewed here:
and a few kids from countries all around the world got to ask a question to the author of the second book about the story. I did this, and my question was chosen! It is answered on the webcast at 39:40 minutes. I asked about Dan and Amy's mother. (Answer)
In return, the 5 kids from my class who also asked questions but weren't answered received a 39 clues balloon, cap, T-shirt, pen, card pack and the second book, each, including me! It was very exciting!