The 39 clues

Fourteen-year-old Amy and her younger brother, Dan, are in the lead as they track down thirty-nine clues to ancient power. Now they have a coded piece of Mozart's music that seems to be leading them to Vienna in their treasure hunt around the world.

Continuing their search for the 39 Clues that lead to a source of great power, Amy and Dan venture to Egypt and receive an unexpected message from their dead grandmother, Grace. The siblings are suspicious, however, as to whether Grace truly wished to help them or was simply setting them up for the biggest betrayal of all.

Amy and Dan seem to be tracking the life of one of the most powerful fighters the world has ever known. They soon realize that this fearsome warrior may be a Cahill, with secrets that are sure to be well-guarded and lethally protected.

Fourteen-year-old Amy Cahill and her younger brother, Dan, travel to Australia to retrace their lost parents' footsteps in the hunt for the thirty-nine clues. The trip brings up terrible memories for Amy and she makes a mistake that costs the life of an ally.

Fourteen-year-old Amy and younger brother Dan are lured into Russia on an adventure to find a stolen treasure and the truth about what happened on the night their parents died.