39 Clues: Doublecross
4 primary works
Book 1
Follow the Leader
At only seventeen years old, Ian Kabra is head of the Cahills, the most powerful family in the world. He has presidents on speed dial, generals at his beck and call. Ian knows he’s an ideal leader and the only man enough for the job. There’s just one small problem: He’s already messed up big-time.
A Cahill from the past calling himself the Outcast has risen to challenge Ian with an impossible test. The Outcast has re-created four of history’s greatest disasters and dared Ian to stop him. If Ian and his allies can’t decipher the Outcast’s hints in time, innocent people will die. Ian’s only chance to beat the Outcast is to track down his former allies, Amy and Dan. But finding Amy and Dan will demand from Ian an impossible sacrifice . . .
Book 2
history has ever known returns with a vengeance in The 39 Clues:
Doublecross!
The Cahills are the world's most powerful family, but their strength
is being tested. A sinister man calling himself The Outcast has
targeted the family and set them an impossible test. He's recreating
four of history's worst disasters and challenging the young
Cahills to find and stop the tragedies before it's too late. Now,
with one disaster behind them, siblings Dan and Amy Cahill and
their friends have just days to discover what the Outcast's next
move will be.
Their frantic search seems to be pointing toward a terrifying air
disaster, the explosion of the Hindenburg airship. But no one travels
by airship anymore -- what do the Outcast's cryptic messages
mean? The young Cahills must split up and take to the skies to
try to find the answer . . . before their whole world comes crashing
down.
Book 3
Book 4
CHECKMATE
Thirteen-year-old Dan Cahill and his older sister, Amy, are running out of time. An exiled Cahill known as the Outcast has already re-created three of history's worst disasters, and he's saved the worst for last. If Dan and Amy can't find and stop the Outcast fast, he will initiate a full-scale nuclear meltdown.
But as Dan and Amy race around the world, they discover something horrifying. The Outcast's disasters are only a smoke screen to cover up his true plan, a diabolical revenge on the family that betrayed him. Soon Amy and Dan will have to confront a hard truth: Sometimes the only way to save the world is to sacrifice everything you love.