In Too Deep by Jude Watson

Book Jacket

Fourteen-year-old Amy Cahill and her younger brother, Dan, head to the Land Down Under to discover what their own mother and father knew about the hunt for the 39 Clues.  But following in their parents' footsteps brings up lost memories for Amy so awful that she can't share then...even with Dan.  Haunted by the ghosts of their past, chased by deadly competitors, Dan and Amy can't see who is an enemy and who is a friend.  Their blindness leads to a terrible mistake...and the death of a hidden ally.

Review

In the 6th book of the 39 Clues series, we get a lot of information!  The Cahill parents are fleshed out, and their cause of death is mostly revealed.  Irena gets a lot of page time, and the hints of her humanity take root in a very real way in this book.  AND we get more of Nellie, who has always been a little too good to be true.

Australia was fun to visit, but it wasn't my favorite location.  I mostly loved the descriptions of Aussies themselves, perpetually sunny and laidback.

We are also introduced to Isabel Kabra, possibly the most evil mother I've ever read about.  YIKES.  I would not want to cross her path, which is not great for Amy and Dan. 
The series is becoming far more wide-reaching, encompassing more than a simple "discover one clue per book" formula.  I like it!

Four out of five airplane pilots.

Release Date:  November 2009
Reading Level: Grade 3+
Where In Dunlap Public Library's Collection: J39C