The mega-bestseller that launched a global phenomenon returns - now as a graphic novel!
Minutes before she died, Grace Cahill changed her will, leaving her descendants with an impossible choice:
“You have a choice - one million dollars or a clue.”
Grace is the last matriarch of the Cahills, the most powerful family in the world.
Everyone from Napoleon to Houdini is related to the Cahills, but the source of the family’s power has been lost.
Now the race for the clues is in full swing, and young siblings Amy and Dan must decide what's more important: finding the clues or uncovering what REALLY happened to their parents.
Part book, part online game, 100% fun.
The perfect gift for kids who think they don’t like to read!
Rick Riordan is the #1 bestselling author of the Percy Jackson & the Olympians series.
