The release date for the English version of 'The Maze of Bones' by
Rick Riordan is Sep 2008. If you enjoy this novel, it is available for buy as a paperback from Barnes & Noble or Indigo, as an ebook on the Amazon Kindle store, or as an audiobook on Audible.
Orphaned twins Amy and Dan Cahill compete with less honorable Cahill ancestors in a race across the globe to locate cryptic clues to a mystery treasure when their beloved aunt, the matriarch of the most powerful family in the world, dies.
The book has game cards that the reader may use to participate in an online treasure hunt.